After upgrading, SpamSieve stops working

I am a relatively new SpamSieve user. I got it working great with Airmail a month or so ago. Then I updated to 2.9.19 and nothing works. It it doesn’t catch Spam I trained it to catch before I upgraded and it doesn’t learn new spam. Nothing. As far as I know I didn’t change any settings. I have been through the manual and checked all the settings. They look right.

Any suggestions?

There were some problems with one of the recent versions of Airmail. Please make sure that you have updated to at least build 289 of Airmail.

If this happens again, you can follow the instructions here to see whether Airmail is sending the message to SpamSieve for analysis.