I finally found a fix for all people with the 503 error!
Unraid is blocking an IP after to many wrong attempts and if u have entered the wrong credentials more then 3 times u will get blocked from unraid! I was sitting on this for more than 6 hours but now its working. To remove the block u have to delete a file.
Its stored under /var/log/pwfail/ and in this folder there is an file with the internal ip of the docker just delete that over ssh and it should work! Hope it helps!
[Support] Electric Brain Unraid API
in Docker Containers
Posted
This fixed my 503 issue. Thanks!