Comment 23 for bug 1875717

When I run
libreoffice /run/user/.../gvfs/....

The file is locked.

This works...
libreoffice smb://...

In other file managers you can set the X-GIO-NoFuse=true option in the .desktop files to force the smb: url, but pcmanfm doesn't do anything with this option.

To fix for pcmanfm, use this attached opener instead, it converts normal file paths to gio (ie. smb://...). In pcmanfm, right click on the file and pick "Custom command" -> pcmanfm_open_libreoffice %u

You can change the existing opener in /usr/share/applications/libreoffice*.desktop