As pcloud is using Electron framework, this might help (having similar experience with another Electron-based app, where this solved issue, although not ideal solution):
pcloud --disable-gpu-sandbox
In my current PC the pCloud 1.9.9 works fine.
You may get hints also from Chromium CLI parameters
If issue persist, I guess it is good time to ask also from pCloud customer support and share results also here so also Arch community can benefit.
Actually wondered, why pcloud is flagged out of date as at pcloud.com is also latest version 1.9.9 - https://www.pcloud.com/release-notes/linux.html
Pinned Comments
Zenzio commented on 2022-08-13 06:44 (UTC) (edited on 2022-08-13 06:45 (UTC) by Zenzio)
@cirlo I contacted their support when I had trouble running pCloud in Sway with GDK_BACKEND=wayland (without ",x11"). Their response was: "Unfortunately, we are having troubles updating the app to the latest electron versions because of inside security libraries that we are using. Our devs know about this issue and electron version update is already planed."