Can't get app to come up using the link (or entry) in the start menu

I recently installed Mullvad browser on one of my copies of Lubuntu 22.04. However, when I click on the link (or entry) for it in the start menu, nothing happens. Yet, when I click on the icon located in my .local/share/applications folder, the browser comes up with no problems. How can I get the browser to come up using the link in the start menu? :-/

Thank you for your help, I appreciate it! :-)