Myopenhad doesn't show my dashboard

I’m trying to get a connection to my dashboard via myopenhab and I’m getting a Error 504.
The website does have me as ONLINE.
The “” shows everything operational for today.

I don’t know if it is related but I changed from one system(Raspi2) to another (Raspi3) and have to put in the new UUID and secret.

Waited half an hour and then it worked again.