Found a fix online!
The method was provided by someone named khronosangel.
So far I haven't noticed any problems or side effects of this fix.
I can choose folders now.
Start Menu Personalization Disabled
Everything is greyed out except for the "Settings". What happened? I did not change anything.
My start menu looked like this before this thing happened:
Then it became like this:
The file explorer became missing.
I need the File Explorer on my Start menu but I can't turn it back on. This is the second issue I have experienced since upgrading to Windows 10. The first issue isn't even resolved yet. Please help. Thanks.