Valenciano

Hi, I see that you've been posting this for a month or so. I was just trying to install NextCloud and I got the same error. What I did to solve it was to remove the docker container and delete any configuration files that may remain on the appdata directory. Then install again the docker container and don't access the webUI for a couple minutes, then you should be good. I found in this guide that you have to give it a minute or so before accessing it. Hope it helps.