I have been getting this error with material that measures .02" on top of the crumb tray. It just started today, and I have been cutting this material for almost a year with no issue.
I tried setting the focus (as suggested in other threads on the forum) to make sure it’s on the material, and have reset my glowforge and router, but still have the problem.
I thought maybe the machine was slightly off level since I moved its table for cleaning this morning. Put it back in the exact same spot now and it didn’t help.
I have cut .01" material on top of the crumb tray before too with no issue, so I’m really confused.