Builds via Rest API return playcanvas-stable.min.js with invalid syntax

I use jenkins to request builds via the Playcanvas Rest API and upload those builds to a server.
This has worked since recently, but now i receive an invalid playcanvas-stable.min.js file.
The file starts like this:

);function a(e)

which of course triggers a syntax error exception. Builds via the editor work fine.
The issue also effects untouched branches, so i don’t think the problem is on our end :confused: