Spam Slieve suddenly not working, does not filter even if you Apply Rules

I am running Mac 12.7.3, on Spam Slieve 3.0.3. It no longer filters spam. I have checked all my settings, they are all correct. Any ideas of what to try to get this to work?

If checking the setup yourself doesn’t help, please use the Save Diagnostic Report command in the Help menu and send me the report file, as described here.