Error 507 configuring Bridge

I bought yesterday an Opener with Nuki Bridge.
I plugged the Bridge. When I try to configure it, I have immediately a 507 error…
And I can’t go further in the configuration process. I tried to find a topic on the forum but impossible…
Anyone could help ?

Please contact our customer care via or for direct help on your issue.

This forum is focused on developer related issues.

But what does Error Code 507 mean, please?