When clicking the "Report a Bug" context button in the Curse App you are sent to a URL with the following format
where XXXXXX is the project ID. This results in a 404. When checking the URL for the "New Issue" button on CurseForge you see that the URL uses the name of the project instead of the ID. I'm thinking a form of redirect is missing?
I've let the developers know! Sorry about that. :/