Welcome! This forum has a treasure trove of great info – Scouters helping Scouters! Just a heads up, though - all content, information, and opinions shared on this forum are those of the author, not the BSA.
I tried editing the title of the the event the morning of the event and ScoutBook Plus is telling me I can not because it’s in the past. I was making the change at 10am. I have full access to calendar functions.
I did a screen capture and could recreate the error. I am using Chrome. Despite the error, the changing the title appears to work. Fun fact, even though you mute the speakers, the Screen Capture tool still captures the music. Enjoy!