Hello @medmedin
First:
That is a DE (Desktop Enviroment)
That is a Distribution.
Question:
- On which Distribution is Mate running on ?
- Which Desktop Environment is running Manjaro?
Beside that, I would say that the libraries on the appimage are older and therefore it does not know the element “description”.
Better use the native version:
pamac install scribus
Just wait a bit and version 1.5.7 becomes available there also.