Question: Error 400 in Calendar
When I try to open Calendar on my MacBook Pro, running High Sierra, two error boxes open that say:
The top error window will close if I click on "Try Again Later," but the bottom one just reopens every time I click on OK, so I get nowhere and have to force quit the Calendar app.
Calendar opens normally on my iPad Pro.
MacBook Pro with Retina display, macOS High Sierra (10.13.2)