@Shadow Carl
Hi, did you try running this without any other mods? I have hard time reproducing the problem. Sadly for me it just works.

I have added "Known conflicts" section to the mod description.

im afraid im running into a very similar issue ;
Also installed a lot of mods recently so hard to pinpoint the possible conflict
this is in solo play btw



function: onClientCommand -- file: server.lua line # 19 | MOD: Antibodies (v1.85)

ERROR: General , 1724348663570> ExceptionLogger.logException> Exception thrown java.lang.RuntimeException: attempted index: modId of non-table: null at KahluaThread.tableget line:1689.
ERROR: General , 1724348663570> DebugLogStream.printException> Stack trace:
java.lang.RuntimeException: attempted index: modId of non-table: null
at se.krka.kahlua.vm.KahluaThread.tableget(KahluaThread.java:1689)
at se.krka.kahlua.vm.KahluaThread.luaMainloop(KahluaThread.java:492)
at se.krka.kahlua.vm.KahluaThread.call(KahluaThread.java:163)
at se.krka.kahlua.vm.KahluaThread.pcall(KahluaThread.java:1980)
at se.krka.kahlua.vm.KahluaThread.pcallvoid(KahluaThread.java:1812)
at se.krka.kahlua.integration.LuaCaller.pcallvoid(LuaCaller.java:66)
at se.krka.kahlua.integration.LuaCaller.protectedCallVoid(LuaCaller.java:139)
at zombie.Lua.Event.trigger(Event.java:64)
at zombie.Lua.LuaEventManager.triggerEvent(LuaEventManager.java:214)
at zombie.spnetwork.SinglePlayerServer.receiveClientCommand(SinglePlayerServer.java:229)
at zombie.spnetwork.SinglePlayerServer.mainLoopDealWithNetData(SinglePlayerServer.java:183)
at zombie.spnetwork.SinglePlayerServer.update(SinglePlayerServer.java:171)
at zombie.GameWindow.logic(GameWindow.java:239)
at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
at zombie.GameWindow.frameStep(GameWindow.java:765)
at zombie.GameWindow.run_ez(GameWindow.java:681)
at zombie.GameWindow.mainThread(GameWindow.java:495)
at java.base/java.lang.Thread.run(Unknown Source)

My guess would be, you have some mod which bundles older copies of Antibodies.

Hmm perhaps cant confirm.
strange thing is though as this is happening the UI is also hidden ... turning off Antibodies brings it back. kinda odd no ?

I'm having a similar issue with Evolving Traits World, where the UI for ETW is being loaded first and then the UI for Antibodies being loaded then loads, causing an error which makes no extra UI pages available, letting the player see only the base game ones.