My project do not get activated in Dorico 5.1.60

My project does not activate in Dorico 5.1.60. I have Dorico set to activate projects automatically when they are opened but it doesn’t activate. And if I press the activation button I get the spinning wheel and Dorico stops responding. I have tried many things. If I open the project and try to close it or try to quit Dorico, Dorico stops responding.

Finally I rolled back to Dorico 5.1.51 and then the project activates and playback normally again.

Anyone else experienced this?

Would you please do from Dorico’s menu Help > Create Diagnostic Report and post the corresponding zip file here? Thanks a lot.
And did this happen only to this one project, or also others?

Sent you the file in PM