Even after changing the level-type to BIOMESOP and generating the world we cant even enter the server

Does everyone have the mod installed on their clients as well?

I'm having the same issue, it doesn't let users connect

yeah for me my server gets stuck in a loop of restarting when i have biomes o plenty enabled as the world gen type

Same here, hope they will fix it.

I can't generate a nether on my server after updating to the latest version due to #1942
Which I believe to be related to this issue

With latest version on Dedi server - and no other mods:
[27Apr2022 10:57:14.542] [main/DEBUG] [net.minecraftforge.server.ServerLifecycleHooks/CORE]: Generating PackInfo named mod:terrablender for mod file C:\minecraft182\mods\TerraBlender-forge-1.18.2-1.1.0.99.jar [27Apr2022 10:57:14.542] [main/DEBUG] [net.minecraftforge.server.ServerLifecycleHooks/CORE]: Generating PackInfo named mod:forge for mod file C:\minecraft182\libraries\net\minecraftforge\forge\1.18.2-40.1.0\forge-1.18.2-40.1.0-universal.jar [27Apr2022 10:57:14.542] [main/DEBUG] [net.minecraftforge.server.ServerLifecycleHooks/CORE]: Generating PackInfo named mod:biomesoplenty for mod file C:\minecraft182\mods\BiomesOPlenty-1.18.2-16.0.0.109-universal.jar [27Apr2022 10:57:17.296] [main/DEBUG] [mixin/]: Mixing MixinPrimaryLevelData from terrablender.mixins.json into net.minecraft.world.level.storage.PrimaryLevelData [27Apr2022 10:57:17.312] [main/DEBUG] [mixin/]: Mixing MixinLevelStem from terrablender.mixins.json into net.minecraft.world.level.dimension.LevelStem [27Apr2022 10:57:17.312] [main/DEBUG] [mixin/]: Renaming synthetic method lambda$onInit$2(Lterrablender/api/RegionType;Lterrablender/worldgen/IExtendedBiomeSource;Lnet/minecraft/core/RegistryAccess;)V to md416eaa$lambda$onInit$2$0 in terrablender.mixins.json:MixinLevelStem [27Apr2022 10:57:17.312] [main/DEBUG] [mixin/]: Renaming synthetic method lambda$onInit$1(Lnet/minecraft/core/Registry;Lcom/google/common/collect/ImmutableList$Builder;Lterrablender/api/Region;)V to md416eaa$lambda$onInit$1$1 in terrablender.mixins.json:MixinLevelStem [27Apr2022 10:57:17.312] [main/DEBUG] [mixin/]: Renaming synthetic method lambda$onInit$0(Lcom/google/common/collect/ImmutableList$Builder;Lnet/minecraft/core/Registry;Lcom/mojang/datafixers/util/Pair;)V to md416eaa$lambda$onInit$0$2 in terrablender.mixins.json:MixinLevelStem [27Apr2022 10:57:17.420] [main/WARN] [net.minecraft.server.Main/]: Failed to load datapacks, can't proceed with server load. You can either fix your datapacks or reset to vanilla with --safeMode java.util.concurrent.ExecutionException: net.minecraft.ResourceLocationException: Non [a-z0-9/._-] character in path of location: minecraft:biomesoplenty