I am on my second EcoFlow Delta Mini with the same issue. It refuses to solar charge more than 60W input when I have two 100W panels connected in series. I have another EcoFlow Delta Mini and it works with the same panel setup with no issues. Only difference I can see is the reported firmware version.
Does your Mini report the correct firmware version?
Does your Mini report the correct firmware version?
One of your field values is stopping the program as an error.