Mail app not responding
The Mail app stopped responding after I tried moving a mail message from the icloud email in box to a local folder. I forced quit Mail and tried opening Mail again. It started to open though nothing happened.
Right clicking Mail on the Dock there is a message saying not responding.
I saw in support of someone accidentally deleting and someone saying to install from the App store. I cannot find the Apple Mail app in the App store. What's more I cannot readily move the Mail app to the Trash. A message says the Mail app is required by Mac OS.
How can I restore the Mail app? My OS is Catalina, 10.15.2. I have an iMac that says Late 2012 in the about window.