Hello I need some help here since it might be a very simple issue.
I can start AppImages just fine, but the Onlyoffice one (regardless of version) says:
./DesktopEditors-x86_64.
AppImage
./DesktopEditors: symbol lookup error: /usr/lib/libtiff.
so.6: undefined symbol: jpeg12_write_raw_data, version L
IBJPEG_8.0
Behold! AppImages are usually not verified by others. Follow these instructions only if you trust the developer of the software. Use at your own risk!
– ONLYOFFICE – AppImages
It simply means, that in this version of the library the symbol jpeg12_write_raw_data is not present, thus the main executable cannot run. Possibly a rename of the symbol?!
Possible problem would be wrong linking: Maybe libtiff.so.5 is needed/included in the AppImage, but it was not linked to that one. Instead it is dynamically linked to system libs.
You did not mention that anywhere. @soundofthunder was the one who advised you to try an AUR package, but you never followed up on that. Instead you kept on saying AppImages are better (in your opinion).
But fine, if your AUR version works, then this thread can be closed.