In my opinion are this the ominous libxcb’s installed in the evelauncher folder again which brought this error: libGLX_mesa.so.0: undefined symbol: xcb_dri3_get_supported_modifiers
So evelauncher cannot start and initialize his config and directories. The error about missing language settings can be ignored. Try to remove all libxcb-files in the launcher directory with rm -v libxcb* and then start evelauncher.sh again.
Greetings @Roesjka btw. nice to see you 