Ft.NOS

so i get this error message: The game crashed whilst exception in server tick loop Error: java.lang.ClassCastException: com.pixelmongenerations.common.world.ultraspace.feature.GenRavineUp cannot be cast to net.minecraft.world.gen.structure.MapGenStructure after removing and adding my mods i found out that it happens when i have the reccurent complex mod on. How can i fix it? crash-2020-07-12_18.36.17-server.txt