So I've solved the tattoo nipple issue so I thought I will share it hereYou could try reporting this issue on CM discord for further investigation. If there's an issue with a plugin they should be able to patch it. Someone who knows the ins and outs of the kiss code could spot the issue from that log. To me it doesn't look like anything obviously wrong with any of the plugins. You might need to do a lot of testing while leaving only the basic plugins enabled. Then add one at a time until the issue occurs. iirc XTmasterSlave was doing something before the error occured. You could try first disabling that plugin. Remove COM3D2.XtMS.Patcher.dll and all dll that have XTMasterSlave in the name. If you don't actively use it, you don't need it anyway.
Did you try resetting the tattoos? Also select the default nipples and color then save the maid preset and the game. Maybe this will remove whatever is stuck.
Assuming not all maid have that issue, you can save the current maid preset, load a default maid preset and using choosy preset select only the features you want to import to that maid from the saved preset such as body, wideslider values, skin, skin color, hairs, hair color, face but no clothes and no nipple information. Leave them to default for now. Don't add body tattoos either. Add them manually.
It could be that one of the clothes mods is forcing the display of nipples. Some kind of porori bra or top. Or some accessory that does that. It's hard to tell without inspecting each item equipped on that preset.
There's nothing in that log. Until you see a yellow warning from ExtendedErrorHandling saying something about substituting chikubi or nipples you can assume that whatever is happening is normal behavior in terms of logic and not an error by itself
You can also edit the skb tattoos menus and add the maskitem chikubi line but it seems that whatever is loaded after the nipple tattoos is adding nipples and might override the previous menu instructions. So you can remove all clothes and add the skb nipples. See what happens in yotogi.
I used:
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(this mod was missing a file called nip_dbt_invisible.model took me a while to find so if anyone needs it feel free to send me a message)Forcefully change one of the texture to a transparent png and replaced the texture. Now even if the nipple option comes back on it will just be transparent.
Thanks for all the help. Took me a while but got there in the end.