OK, some things to try which will help me narrow it down:
Could you try launching the app from a terminal with this in front of the command?
For the AppImage, from the folder it's in:
chmod +x Dungeon.Reader_0.5.16_amd64.AppImage
WEBKIT_DISABLE_DMABUF_RENDERER=1 ./Dungeon.Reader_0.5.16_amd64.AppImage
If the text is still missing, try the same thing with WEBKIT_DISABLE_COMPOSITING_MODE=1 instead.
It would be awesome if you could let me know which one works (if either does) so I can build the fix into the next release. If neither works, could you send me:
- your distro and version
- your graphics card and driver (e.g. NVIDIA proprietary, Mesa)
Thanks!