Failed to load mods: Kux-CoreLib/lib/Table.lua:1:module Kux-CoreLib/lib/init not found; no such file Kux-CoreLib/lib/init.lua
stack Traceback:
(C): in function 'require'
Kux-CoreLib/lib/Table.lua:1:in main chunk
(C): in function 'require'
Kux-RawDataProvider/Modukes?RawData.lus:1:in main chunk
(C): in function 'require'
Kux-RawDataProvider/data.lua:2:in main chunk

Mods to be disabled:
Kux-RawDataProvider (2.3.0)

I assume the problem is you have updated Kux-CoreLib to 2.6.0 while Kux-RawDataProvider still needs 2.5.0
If possible downgrade to a version < 2.6.0
I will update Kux-RawDataProvider soon.

Yes, that is indeed the issue. However, I also updated GhostInHand, so I will just wait for the update, not in a rush.

GhostInHand update has no changes, it was also only necessary because 2.6.0 ;-) the previous version is still working with 2.5.x
It is a vicious circle when you update Kux-CoreLib to 2.6.0, all other mods must also use 2.6.0. because a braking change.
I know its idifficult to know, when to update, I also always want to have my update list empty ;-)

Now I get:

Failed to load mods:__Kux-RawDataProvider__/data.lua:2:module src.moduless.RawData not found; no such file __Kux-RawDataProvider__/src/moduless/RawData.lua no such file __Kux-RawDataProvider__/src/moduless/RawData.lua no such file __core__/lualib/src/moduless/RawData.lua
stack trace:
(C): in function 'require'
__Kux-RawDataProvider__/data.lua:2: in main chunk

Mods to be disabled:
Kux-RawDataProvider (2.3.2)

sorry, I dont know how the mistake "moduless" instead of "modules" could happen. must be a bug in a VSCode extension which generates the path.
Fixed and localy tested n 2.3.3
best regards
at 3:50 a.m. good night

Working again for me, thank you very much!

FYI: I have renamed the prototype mods, see new mods:
https://mods.factorio.com/mod/Kux-PrototypeExport
https://mods.factorio.com/mod/zzz-Kux-PrototypeExport-Compose

Edit: Please ignore, I have it working properly now.

Also noted, the export process seems to complete much quicker than the previous versions. I run the Mac version and it would beach-ball briefly during the export and pause Recipe Book's update. Much smoother now.

Edit 2: Maybe performance difference is due to amount of data being exported