Adding a custom form to an issue suddenly stopped working

Hi everyone,

I have a scenario that attaches a couple of custom forms to an issue. It was working fine cca 4 hours ago, but all of the sudden I start getting the following error:
The operation failed with an error. [422] APIModel V22_0 action assignCategory does not support argument named alreadyAttached

The original module being used is Misc Action, with the following setup
 

And I also tried using a Custom API Call as such
 

Both modules give me the same error message. I’m really at a loss here, especially since this was working today without issues.

Any ideas what can be the issue or how I can fix this?

Thank you