Login Stock in nextcloud

Dear NextCloud Team,

I have problem in login the nextcloud when I attemp to configure in our sonicwall to access in the internet side.

But in the localhost its working and I can login in direct server localhost, using admin and password then it will view my dashboard.
See reference photo…

It is never a good idea to share your public address.
Since you are reporting an issue with your instance, a misconfiguation can be the cause of the problem. It also means that this information can be abused.

Do you have more information about your configuration and setup?
(hidding your private information please!!)