I believe there is a bug in xdg-email affecting --attach (https://bugs.launchpad.net/ubuntu/+source/xdg-utils/+bug/1909941?comments=all) (sorry, the last attempt closed on me before I'd finished)
The fix for that wor3ks in Claws-mail 3.17.8, but not in 3.17.5 which is the latest version for Ubuntu 20.04 LTS.
I get the same error when calling xdg-email --attach FILENAME from the command-line as seems to be occurring when it is run from senddoc.
I've asked for a backport of Claws 3.17.8 to Ubuntu 20.04 ... !
I believe there is a bug in xdg-email affecting --attach /bugs.launchpad .net/ubuntu/ +source/ xdg-utils/ +bug/1909941? comments= all)
(https:/
(sorry, the last attempt closed on me before I'd finished)
The fix for that wor3ks in Claws-mail 3.17.8, but not in 3.17.5 which is the latest version for Ubuntu 20.04 LTS.
I get the same error when calling xdg-email --attach FILENAME from the command-line as seems to be occurring when it is run from senddoc.
I've asked for a backport of Claws 3.17.8 to Ubuntu 20.04 ... !