Same problem. Mine usually will not run a full normal cycle. It works for a while, then beeps, then stops. Sometimes it says I need to clean the filter (even when it is clean).
The solution I have found is to to switch to a timed dry (30 minutes) and repeat until the clothes are dry.
I’ve never had a problem with a dryer before…but this is my first ventless dryer. Maybe that’s a factor?