ну заходишь на страницу мода и выбираешь из списка.
какой именно мод ищите?

Ну Drakonic на forge-1.12.2-14.23.5.2838-universal.jar скачивал разные все крашется 

Fishstick,  ну тогда может проще фордж подобрать для этого мода?

А если не сколько модов

 at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:212) ~[LoadController.class:?]
  at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:190) ~[LoadController.class:?][color=#CACACA]
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_222][color=#CACACA]
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_222][color=#CACACA]
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_222][color=#CACACA]
  at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_222][color=#CACACA]
  at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[guava-17.0.jar:?][color=#CACACA]
  at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:119) ~[LoadController.class:?][color=#CACACA]
  at cpw.mods.fml.common.Loader.loadMods(Loader.java:513) ~[Loader.class:?][color=#CACACA]
  ... 5 more[color=#CACACA]
 Caused by: java.lang.ClassNotFoundException: net.minecraft.client.multiplayer.WorldClient[color=#CACACA]
  at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?][color=#CACACA]
  at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_222][color=#CACACA]
  at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_222][color=#CACACA]
  at java.lang.Class.forName0(Native Method) ~[?:1.8.0_222][color=#CACACA]
  at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_222][color=#CACACA]
  at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:440) ~[FMLModContainer.class:?][color=#CACACA]
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_222][color=#CACACA]
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_222][color=#CACACA]
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_222][color=#CACACA]
  at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_222][color=#CACACA]
  at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[guava-17.0.jar:?][color=#CACACA]
  at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:212) ~[LoadController.class:?][color=#CACACA]
  at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:190) ~[LoadController.class:?][color=#CACACA]
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_222][color=#CACACA]
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_222][color=#CACACA]
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_222][color=#CACACA]
  at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_222][color=#CACACA]
  at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[guava-17.0.jar:?][color=#CACACA]
  at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:119) ~[LoadController.class:?][color=#CACACA]
  at cpw.mods.fml.common.Loader.loadMods(Loader.java:513) ~[Loader.class:?][color=#CACACA]
  ... 5 more[color=#CACACA]
 Caused by: java.lang.RuntimeException: Attempted to load class bjf for invalid side SERVER[color=#CACACA]
  at cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:50) ~[forgea.jar:?][color=#CACACA]
  at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?][color=#CACACA]
  at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?][color=#CACACA]
  at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_222][color=#CACACA]
  at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_222][color=#CACACA]
  at java.lang.Class.forName0(Native Method) ~[?:1.8.0_222][color=#CACACA]
  at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_222][color=#CACACA]
  at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:440) ~[FMLModContainer.class:?][color=#CACACA]
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_222][color=#CACACA]
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_222][color=#CACACA]
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_222][color=#CACACA]
  at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_222][color=#CACACA]
  at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[guava-17.0.jar:?][color=#CACACA]
  at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:212) ~[LoadController.class:?][color=#CACACA]
  at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:190) ~[LoadController.class:?][color=#CACACA]
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_222][color=#CACACA]
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_222][color=#CACACA]
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_222][color=#CACACA]
  at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_222][color=#CACACA]
  at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[guava-17.0.jar:?][color=#CACACA]
  at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[guava-17.0.jar:?][color=#CACACA]
  at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:119) ~[LoadController.class:?][color=#CACACA]
  at cpw.mods.fml.common.Loader.loadMods(Loader.java:513) ~[Loader.class:?][color=#CACACA]
  ... 5 more[color=#CACACA]
 [11:09:06] [color=red][Ошибка сборки]: This crash report has been saved to: /data/./crash-reports/crash-2020-03-22_11.09.06-server.txt
 [11:09:06] [Server thread/WARN] [FML]: Can\'t revert to frozen GameData state without freezing first.[color=#CACACA]
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_onFire]: Skipping event FMLModIdMappingEvent and marking errored mod DynamicLights_onFire since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_creepers]: Skipping event FMLModIdMappingEvent and marking errored mod DynamicLights_creepers since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_dropItems]: Skipping event FMLModIdMappingEvent and marking errored mod DynamicLights_dropItems since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_entityClasses]: Skipping event FMLModIdMappingEvent and marking errored mod DynamicLights_entityClasses since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_mobEquipment]: Skipping event FMLModIdMappingEvent and marking errored mod DynamicLights_mobEquipment since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_flameArrows]: Skipping event FMLModIdMappingEvent and marking errored mod DynamicLights_flameArrows since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_floodLights]: Skipping event FMLModIdMappingEvent and marking errored mod DynamicLights_floodLights since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_otherPlayers]: Skipping event FMLModIdMappingEvent and marking errored mod DynamicLights_otherPlayers since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_thePlayer]: Skipping event FMLModIdMappingEvent and marking errored mod DynamicLights_thePlayer since required dependency DynamicLights has errored
 [11:09:06] [Server thread/INFO] [FML]: Applying holder lookups[color=#CACACA]
 [11:09:06] [Server thread/INFO] [FML]: Holder lookups applied[color=#CACACA]
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_onFire]: Skipping event FMLServerStoppedEvent and marking errored mod DynamicLights_onFire since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_creepers]: Skipping event FMLServerStoppedEvent and marking errored mod DynamicLights_creepers since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_dropItems]: Skipping event FMLServerStoppedEvent and marking errored mod DynamicLights_dropItems since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_entityClasses]: Skipping event FMLServerStoppedEvent and marking errored mod DynamicLights_entityClasses since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_mobEquipment]: Skipping event FMLServerStoppedEvent and marking errored mod DynamicLights_mobEquipment since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_flameArrows]: Skipping event FMLServerStoppedEvent and marking errored mod DynamicLights_flameArrows since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_floodLights]: Skipping event FMLServerStoppedEvent and marking errored mod DynamicLights_floodLights since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_otherPlayers]: Skipping event FMLServerStoppedEvent and marking errored mod DynamicLights_otherPlayers since required dependency DynamicLights has errored
 [11:09:06] [color=red][Ошибка сборки] [DynamicLights_thePlayer]: Skipping event FMLServerStoppedEvent and marking errored mod DynamicLights_thePlayer since required dependency DynamicLights has errored
 [11:09:06] [Server thread/INFO] [FML]: The state engine was in incorrect state ERRORED and forced into state SERVER_STOPPED. Errors may have been discarded.[color=#CACACA]
 [11:09:06] [Server thread/INFO] [FML]: The state engine was in incorrect state ERRORED and forced into state AVAILABLE. Errors may have been discarded.[/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color][/color]

Я вот скачал сборку и нужный форж, но выдает ошибки

А без модов запускаю и норм

Один мод ставлю и слетает

А зачем ставить на сервер мод, сделанный для клиента игры, а потом удивляться почем КРАШ?
Вы бы ещё моды от ГТА - санандрес поставили и спрашивали почему Майнкрафт не работает. 
Даже в описании к моды КАПОСОМ написано, что ставить этот мод на сервер - не нужно, будет краш.