Messages not opening on MacBook Air
A couple of months ago, imessage quit on my Macbook air, and I've never been able to open it since. I have restarted my laptop many times, but it doesn't open. I click it, the top left corner shows imessage is open for about half a second, then it quits again. The app itself never opens. Sometimes if I click on it enough, it opens a problem report telling me messages quit unexpectedly. It says "Terminating app due to uncaught exception 'NSGenericException', reason: 'Unable to activate constraint with anchors <NSLayoutDimension:0x600003992840 "CKUIWindow_60754894:0x148f91950.width"> and <NSLayoutDimension:0x600003992c80 "UILayoutContainerView:0x119c1b150.width"> because they have no common ancestor. Does the constraint or its anchors reference items in different view hierarchies? That's illegal."
[Re-Titled by Moderator]
MacBook Air (2018 – 2020)