I've been having the same problem since March 31. I think it started with a Windows 11 update that occurred around then, and I think it is related to .NET (whatever that is). Dealer put in a ticket with C4 and they told him "Composer is not designed for Windows 11, however it will be fully compatible in the near future. A big software update has recently been announced and I'm told it should likely roll out around the end of May (it's currently in beta-testing). Maybe that will also include Windows 11 compatibility??"