Mail Preference Panel is Blank after updating to High Sierra
I just finished updating to High Sierra from Sierra on my late 2013 iMac.
For some reason both Outlook from Office 2011 opened automatically, but that is another question for later. I did uncheck the option that would make it the default email app, though it does still open automatically when booted up.
When open (Apple) Mail it shows some of my email accounts failing to connect. I opened Connection Doctor and it showed the accounts with the problem. I went to Mail Preferences under the Mail menu, but all that came up was a blank box with Accounts in the title.
Normally there are options for Rules, Junk mail, General, etc. All I get is this
I did the same update with my Mid 2012 15-inch MBP with no problem. Preference panel show up with all options.
Has this happened to anyone else and is there a workaround?
iMac, macOS Sierra (10.12), 27" 3.5 GHz Intel core i7, 32gb mem