"There was a problem sharing the document: Could not find telegram"

Hello! I recently tried to replace Gwenview and Okular with Flatpak versions, but faced some problem. When I tried to share the document via Telegram, I received the error report “There was a problem sharing the document: Could not find telegram” in Okular and the same (“Error while sharing: Could not find telegram”) in Gwenview. Telegram installed via Flatpak. Meanwhile, Gwenview and Okular from the Ubuntu repository work properly.
Can this be fixed by changing settings (for example, via Flatseal)?

you might need to walk us through how you try to share the document

I’m trying to do this through the “Share” menu in both programs.

gwenview296×214 12.1 KB

That’s not going to work, as far as I know.

Would probably only work, if Add a sharing portal · Issue #12 · flatpak/xdg-desktop-portal · GitHub ever becomes a reality

Could the problem be related to the fact that I have a very old xdg-desktop-portal (1.14.4)? Can anyone check how the newer version works?