SUMMARY *** Trying to open a pdf from an smb share in the flatpak version of Okular throws an error Could not open smb://<path redacted>.pdf. Reason: Unable to create io-slave. Unknown protocol 'smb'. STEPS TO REPRODUCE 1. Browse smb share in dolphin 2. open pdf in okular 3. Get kio error OBSERVED RESULT error Could not open smb://.pdf. Reason: Unable to create io-slave. Unknown protocol 'smb'. EXPECTED RESULT Open pdf SOFTWARE/OS VERSIONS Linux/KDE Plasma: Fedora Kinoite (available in About System) KDE Plasma Version: 5.25 KDE Frameworks Version: 5.94.0 Qt Version: 5.15.4 ADDITIONAL INFORMATION
Does that system have kio-fuse installed? It's pretty much a requirement for sandboxes
rpm -qa | grep kio-fuse returns kio-fuse-5.0.1-3.fc36.x86_64 as installed
appears to be a distro issue