[qubes-users] Template manager fails to fetch template list after in place upgrade to 4.2


when opening/refreshing the template list in the Qubes Template Manager it shows: ERROR: qrexec call 'qubes.TemplateSearch' failed: unexpected data format.
The same error is displayed when trying to install templates in the terminal.

Does anyone know how to solve this issue?
(might be similar to Attempting to install template results in `ERROR: qrexec call 'qubes.TemplateSearch' failed: unexpected data format.` · Issue #8303 · QubesOS/qubes-issues · GitHub)

Could it be the case that the upgrade script was not fully completed without showing this explicitly as an error in the end? Would there be any harm done in repeating the last steps of the upgrade script as stated below?

sudo qubes-dist-upgrade --all-post-reboot
or only:
sudo qubes-dist-upgrade --convert-policy, -p

Many thanks,