I see a similar report on Apache OpenOffice, also on the Ubuntu bug reports.
Following a hint from the latter, I deleted the entry "/usr/bin/claws-mail" in Tools/Options/Internet/Email and tried again to send a document. This time no error was reported to the GUI, but I'd called soffice from the commandline, and there an error had appeared "/usr/lib/libreoffice/program/senddoc: 361: /usr/lib/libreoffice/program/senddoc: /usr/bin/claws-mail: Permission denied"
A long listing shows
-rwxr-xr-x 1 root root 3950472 Dec 17 2017 /usr/bin/claws-mail
which looks ok?
I'll restore the setting in Tools/Options, since a visible error message is better than an invisible one!
I see a similar report on Apache OpenOffice, also on the Ubuntu bug reports. claws-mail" in Tools/Options/ Internet/ Email and tried again to send a document. This time no error was reported to the GUI, but I'd called soffice from the commandline, and there an error had appeared "/usr/lib/ libreoffice/ program/ senddoc: 361: /usr/lib/ libreoffice/ program/ senddoc: /usr/bin/ claws-mail: Permission denied"
Following a hint from the latter, I deleted the entry "/usr/bin/
A long listing shows
-rwxr-xr-x 1 root root 3950472 Dec 17 2017 /usr/bin/claws-mail
which looks ok?
I'll restore the setting in Tools/Options, since a visible error message is better than an invisible one!