Bug my server

[Gamelafter]

[19:28:26] [Server thread/ERROR] [minecraft/MinecraftServer]: Encountered an unexpected exception
java.lang.NoClassDefFoundError: net/minecraft/client/resources/IResourceManagerReloadListener
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_201]
        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_201]
        at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:526) ~[forge-1.12.2-14.23.5.2768-universal.jar:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_201]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_201]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_201]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_201]
        at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91) ~[minecraft_server.1.12.2.jar:?]
        at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150) ~[minecraft_server.1.12.2.jar:?]
        at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76) ~[minecraft_server.1.12.2.jar:?]
        at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399) ~[minecraft_server.1.12.2.jar:?]
        at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71) ~[minecraft_server.1.12.2.jar:?]
        at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116) ~[minecraft_server.1.12.2.jar:?]
        at com.google.common.eventbus.EventBus.post(EventBus.java:217) ~[minecraft_server.1.12.2.jar:?]
        at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:218) ~[forge-1.12.2-14.23.5.2768-universal.jar:?]
        at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:196) ~[forge-1.12.2-14.23.5.2768-universal.jar:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_201]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_201]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_201]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_201]
        at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91) ~[minecraft_server.1.12.2.jar:?]
        at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150) ~[minecraft_server.1.12.2.jar:?]
        at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76) ~[minecraft_server.1.12.2.jar:?]
        at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399) ~[minecraft_server.1.12.2.jar:?]
        at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71) ~[minecraft_server.1.12.2.jar:?]
        at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116) ~[minecraft_server.1.12.2.jar:?]
        at com.google.common.eventbus.EventBus.post(EventBus.java:217) ~[minecraft_server.1.12.2.jar:?]
        at net.minecraftforge.fml.common.LoadController.redirect$onPost$zza000(LoadController.java:560) ~[LoadController.class:?]
        at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:135) ~[LoadController.class:?]
        at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:593) ~[Loader.class:?]
        at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:98) ~[FMLServerHandler.class:?]
        at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:333) ~[FMLCommonHandler.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:125) ~[nz.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486) [MinecraftServer.class:?]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_201]
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.resources.IResourceManagerReloadListener
        at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_201]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_201]
        ... 35 more
Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.SideTransformer@3a91d146 from coremod FMLCorePlugin
        at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:260) ~[forge-1.12.2-14.23.5.2768-universal.jar:?]
        at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
        at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_201]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_201]
        ... 35 more
Caused by: java.lang.RuntimeException: Attempted to load class ceq for invalid side SERVER
        at net.minecraftforge.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:62) ~[forge-1.12.2-14.23.5.2768-universal.jar:?]
        at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:256) ~[forge-1.12.2-14.23.5.2768-universal.jar:?]
        at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
        at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_201]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_201]
        ... 35 more
[19:28:26] [Server thread/ERROR] [minecraft/MinecraftServer]: This crash report has been saved to: C:\Users\Ricardo\Desktop\servidor final\.\crash-reports\crash-2019-02-16_19.28.26-server.txt

 

I just want to play with some friends have a good time

[DaemonUmbra]

One of your mods is broken and trying to access client-only code from common code. I can't tell which mod from the information you've provided.