I just had this issue with how I couldn't open the trash folder in any file
manager on Ubuntu. "Timeout was reached" was the error message displayed by
two of them. rm -r ~/.local/share/Trash/* didn't do the trick and all of the
files therein were owned by my user and group so sudo was unnecessary. One
of the diagnostic threads mentioned gvfs version so I figured something was
the matter with that and sure enough killing the offending gvfs-trash
process was enough to fix the issue without necessitating a reboot.