Error 502: Service Unreachable - Retry later.

Hi all,

First of all thank you to all the team involved in making a new future for Zimbra OSE.

After following up the instructions in,

https://docs.zextras.com/carbonio-ce/html/single-server-installation.html

I found the error in subject when trying to login to the user interface, the admin interface just logs in and logs out immediately.

Looking at the log,

/var/log/carbonio.log

No error is shown.

Can someone help?

Thanks in advance,

Miguel