Controller mappings - 200 OK in Chrome - 404 Not found in Firefox, Vivaldi, Postman REST client

Enonic version: 6.9.3
OS: Ubuntu

I’m experiencing som strange behaviour when trying to use Controller mappings. I’m trying to map to a service but the request fails on firefox, restclient… but not on Chrome see attachment. It fails on POST request too on all devices.

Am I using it wrong ?

Are you logged-in in both browsers with the same user?
Looks like an issue with permissions.

I deleted the work directory on the server. everythings works OK now.

Case closed.