Synology Docker - New installation - user registration error

[druid86]

Dear Danny,
When I started the container for the first time, I got the following error when creating the first user. I created the encryption key with the terminal command "openssl rand -hex 32".
Host: Container Manager 24.0.2-1066 in DSM 7.3.2-86009 Update 4, local access (e.g., 192.168.x.x:5090):
"Bad Request
The CSRF session token is missing."
How can I fix this?
Regards
Simone

[druid86]

After numerous attempts, I solved the problem.
The problem stemmed from trying to access the local network (via the server's IP number) via port 5090.
I don't understand why this didn't happen with May. However, with Casey, by configuring a reverse proxy, I was able to access it via a web domain (example.com, for example) via HTTPS, and the error disappeared.
This means that with Container Manager on Synology, you can only access Casey after configuring an HTTPS connection. I hope this helps others too.
Best regards
Simone