Kerberos is expected to be installed on the system and doesn't ship with AppImage. However folks from Reddit advised to take a look at the specific Kerberos implementation that is used with Qnapi, as it seems to be outdated. This may explain a bit more as well:
https://github.com/AppImage/AppImages/issues/187
Tested file: QNapi-0.2.3-x86_64.appimage On Solus and Debian Testing (buster, 4.17.0-1-amd64)
Reddit post: https://www.reddit.com/r/SolusProject/comments/8ebwdz/appimage_libkrb5so26_library_missing/
Kerberos is expected to be installed on the system and doesn't ship with AppImage. However folks from Reddit advised to take a look at the specific Kerberos implementation that is used with Qnapi, as it seems to be outdated. This may explain a bit more as well: https://github.com/AppImage/AppImages/issues/187