Gateway Time-out error

Hi,
I got this error while working midway on node red. I got a pop up saying session expired and it logged out of the flows, but when I am trying to log back in again it says something like "Gateway time-out" ngix. Has anyone come across this before?
Attaching a screenshot of the event, any kind of help would be appreciated.

You're gonna have to explain your setup, nginx is not a part of the standard installation

Ok,
I am enabling node red as an application in a remote module - Mbnet device. I do not have a node red desktop application.