Your .zip files published on CurseForge/Curse doesn't include the external libs.

Yeah it seems the packager failed to grab the sub-modules when it put the zip together. I'll reupload it to both of them.

Can confirm this issue. Also:

1x BagSync\modules\search-Suchen.lua:8: Cannot find a library instance of "LibItemSearch-1.2".
[C]: in function `error'
Masque\Libs\LibStub\Libstub.lua:38: in function `LibStub'
BagSync\modules\search-Suchen.lua:8: in main chunk