Permissions to access storage for Telegram app

Ubuntu 18.04, recent update, now 18.04.5. Telegram works well in other respects. Suddenly telegram desktop hangs needs force quit, as I attempt to upload a file png jpg etc. all worked well before update I think.telegram permissions in Ubuntu software centre are ON. all is ok in my account when using android mobile phone. Comments appreciated. Tia

edit: the hang occurs immediately I access the file manager without selection of a file. If I close the file manager, hang still in place. Earlier I change the default file manager from nautilus to nemo in the hope the problem might go away, no luck.

Solution 1:

solved. Install was via (tsetup.2.5.1.tar.xz) in download folder - so it was outside the ubuntu software umbrella - unusual for me. The Updater in the telegram install, setup folder - run once again, fixed it.