I've imported a query service from the Account object of Salesforce.
When I test the query service -- I get records returned with no problem.
When I attempt to run the exact same query from the Form (using an appery.io proxy), I get a Bad Request error.
The service does returns a Failure. Is it possible your Proxy isn't working?
I was having the same problem with a previous project, but figured I'd start over and create a new project from a good backup. That didn't work either! Did something change on your system?
Thanks,
Carl