Hi @MotionMan,
First, we can only configure the normal string type, Date or Number type fields in Filter query.
We cannot use fields like Lookup, Person, or Choice.
In addition, if there are common String type fields, you need to add single quotes outside the judgment condition.
I noticed that the single quotes you configured do not seem to be single quotes in English. Please adjust the input method to the state of entering English, and then reconfigure the Filter query.

Please take a try.
Best Regards,