Xubuntu 20.04 LTS / Thunar File Manager error GDBUS related

[JohnWaldew]

Occasionally on first boot (after shutdown), the system boots up much slower than usual, and when i try to open the file manager nothing happens.

Then I decide to shut down or restart the computer through the desktop environment (I use Xfce4), click the "Log out..." button in the Whisker Menu and i get the error:

"GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs:Type of message, "(yb)", does not match expected type"(b)"

This issue happens MUCH more frequently when i restart my computer, instead of shutting down.

HOWEVER, if i use "pkill thunar" it restarts, and it works flawlessly sometimes and all the errors and issues are gone, but sometimes this doesn't fix it. That is why is believe it is a thunar related problem.

The system installation is barely modified, could be even considered completely new. No system changes were made.

Specifications:

Kernel: Linux 5.4.0-58-generic
Hardware Platform: x86_64
Operating System: GNU/Linux
Desktop Session: Xubuntu
Distributor ID: Ubuntu Description: Ubuntu 20.04.1 LTS Release: 20.04 Codename: focal

Thunar packages used:

ii libthunarx-3-0:amd64 1.8.14-0ubuntu1 amd64 extension library for thunar
ii thunar 1.8.14-0ubuntu1 amd64 File Manager for Xfce
ii thunar-archive-plugin 0.4.0-2 amd64 Archive plugin for Thunar file manager
ii thunar-data 1.8.14-0ubuntu1 all Provides thunar documentation, icons and translations
ii thunar-media-tags-plugin 0.3.0-2 amd64 Media tags plugin for Thunar file manager
ii thunar-megasync 3.0.1 amd64 Extension for Thunar to interact with Megasync
ii thunar-volman 0.9.5-1 amd64

I am attaching files where the Trash Thunar applet becomes unavailable, using an red exclamation icon,

also showing pictures where i can't open image files on my desktop, and i can't place files inside the thunar Thrash.

and also showing that after a successful restart the Trash applet icon is working, i can open image files as well.

Here is the link: https://imgur.com/a/lZG8wbR

[lotuspsychje (lotuspsychje)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:
apport-collect 1909393

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Sean Davis (bluesabre)]

Possibly related: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1921920