have the creating of a new Firefox profile helped you?
Hello - this is an awesome reply to this problem, as many people will benefit from it, mainly because most people will ask the question *before* trying out to create a new profile *or* reading the first post.
To answer it, we must dig deep into the first post. It is a speculative approach, but OP states (quote:) "I had to create a new Firefox profile and disable the CSP checks
to be able to register."
I am not a technician (well, actually I am) but this reads as if he
was actuallay able to register with the new profile.
The point of this answer is: Don't expect people to come back to give these kind of trivial answers - they don't owe you anything. Please try things out before asking, read with attention to what the OP states, and watch more monty python. Thank you.
Edit: "Hello", "please" and "thank you" are no swear words. ;)