Calendar widget: Can't add events, Save button doesn't work

Hi, my apologies if this is already known. did a few searches and couldn't find anything:

Really liking the new Touch Bar calendar widget, but I can't add new events. When I press the add event shortcut, I get the new event screen where I can add all the details but when I press the Save button nothing happens. Maybe its some permission thing??

Tried using BTT internal calendar, or Apple Cal, and it's the same

thanks a mill

MacBook Pro 15" 2017
Mojave 10.14.5
BTT 3.149

I would advise to check with BTT 3.157, it fixes the issue for me.