When I click on trash icon, I get this error message:
"Failed to execute default File Manager: Failed to execute child process "run"(No such file or directory).
Any help is appreciated.
Try to re-install the file manager i am going to assume you are using the default manager nautilus.
sudo apt-get remove nautilus
This will un-install then you can re-install with
sudo apt-get install nautilus
Hopefully this will replace any missing files or folders an get it working again.