The current version of OPCN (5.10.2.-2+c6b6fb6) when installed via Flatpak on a recent distro (OpenSUSE 15.6) where xdg-desktop is active will trigger a warning from the Portal as OPCN App does not have the right manifest to run in background.
Under KDE (may be also Gnome) the user is offered to Ignore or Quit (no option to accept).
- Ignore will let the warning visible but OPCN will keep running. The warning remains at each OPCN start.
- Quit will kill OPCN and will keep killing it after every further launches.
Issue to not easy to troubleshoot as there is no info in system journal/log nor in OCPN log.
Quick new OCPN fix.
run the command
$ flatpak permission-set background background org.openCPN yes
Can check that the change as been accepted with the command bellow.
$ flatpak permissions
Quick fix could be to add the command in the manual
Better change the manifest to request background right.