My Mod Pack Destroys Minecraft

[Rudiy2000]

I use Minecraft 1.5.1 Forge version with my mod pack but my world loading is staying on a "buliding terrain". Is there any possibility to reapir that. For more informations i show what the command window presents when i try to load the world:

 

B#695]  2021-09-29 22:23:23 [SEVERE] [ForgeModLoader] The ForgeModLoader state engine has become corrupted. Probably, a state was missed by and invalid modification to a base classForgeModLoader depends on. This is a critical error and not recoverable. Investigate any modifications to base classes outside ofForgeModLoader, especially Optifine, to see if there are fixes available.
[B#695]  2021-09-29 22:23:23 [INFO] [STDERR] Exception in thread "Server thread" java.lang.RuntimeException: The ForgeModLoader state engine is invalid
[B#695]  2021-09-29 22:23:23 [INFO] [STDERR]     at cpw.mods.fml.common.LoadController.transition(LoadController.java:134)
[B#695]  2021-09-29 22:23:23 [INFO] [STDERR]     at cpw.mods.fml.common.Loader.serverStopped(Loader.java:800)
[B#695]  2021-09-29 22:23:23 [INFO] [STDERR]     at cpw.mods.fml.common.FMLCommonHandler.handleServerStopped(FMLCommonHandler.java:468)
[B#695]  2021-09-29 22:23:23 [INFO] [STDERR]     at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:530)
[B#695]  2021-09-29 22:23:23 [INFO] [STDERR]     at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)