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I haven't had any luck running the appImages for The Pawn and Guild of Thieves on my Manjaro Linux. Both fail with:
This application failed to start because it could not find or load the Qt platform plugin "xcb" in "". Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb. Reinstalling the application may fix this problem. Aborted (core dumped)
The new Jinxter appImage runs ok (the title music stutters, but that's not my main concern now).
It seems like whatever library incompatibility existed in the earlier appImages fixed itself in the meantime. Could you re-build the Pawn and Guild appImages?