GET COLLECTION: issue with dynamic parameters

I would like to return the result of a query with multiple parameters. If I enter the parameter value in GET COLLECTION Relative path everything works fine, e.g. my_table?

Note: I’m using PostgREST, hence the “=eq.”

Using a {parameters} URL placeholder for the same string causes an error: relation “test_update?” does not exist"

Actually I wanted to combine more than 1 parameter, e.g. Drei but if even one doesn’t work… Any idea how to implement this? Thank you.

I’ve found the solution by trial and error (and Chrome developer tools): the parameter should NOT be encoded; AG inserts weird tags in the URL