Frankly I have no idea why it crashes
ok, thank you for trying to help me ! 
Posts by ageroulbi
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ok here it is https://mclo.gs/Yo4B7p4
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hello i want to play in survival with a few mods with a friend, but the server won't launch :
there is the error code :
i don't know where the eror came from. Please help me
[main/ERROR] [LaunchWrapper]: Unable to launch 179 java.lang.ClassNotFoundException: org.spongepowered.asm.launch.MixinTweaker 180 at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[?:1.8.0_275] 181 at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[?:1.8.0_275] 182 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352) ~[?:1.8.0_275] 183 at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_275] 184 at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:106) ~[launchwrapper-1.12.jar:?] 185 at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[?:1.8.0_275] 186 at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_275] 187 at java.lang.Class.forName0(Native Method) ~[?:1.8.0_275] 188 at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_275] 189 at net.minecraft.launchwrapper.Launch.launch(Launch.java:98) [launchwrapper-1.12.jar:?] 190 at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?] 191 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_275] 192 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_275] 193 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_275] 194 at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_275] 195 at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:70) [forge.jar:?] 196 at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:34) [forge.jar:?]