Adding a new class through properties panel crashes PG

Every time I try to add a class from the Element Properties panel PG crashes. Creating classes from the Styles panel works fine.

I’m on an iMac with the Apple M1 chip and everything up to date, with macOS Monterrey and Pinegrow 6.7 installed, but the same happened on Big Sur and an older version of Pinegrow (don’t know which actually because I installed test version first and then bought license).

@Spiderwoman does this happen only on a specific project, or in general (for example, on one of the provided page templates in New page)?

The best would be if you could send a short video of the issue to, so that we can investigate.