SpamSieve Interrupting Shut-down

I just swapped out my old Mac Intel cheese-grater for a new MacStudio with Sequoia. Now, each time I shut down, I get a message that SpamSieve is interrupting shutdown. The only way to finish shutting down is to use Force Quit to get out of SpamSieve. Anyone else experience this, and how did you fix it?

Please record a sample report during the hang so that we can look into why it’s necessary for force quit.

Sure, will do.