I am running Ubuntu 18.04. I am able able to connect my laptop to all networks except my university wifi which requires authentication. Instead of the wifi login page, I get a page saying "Error resolving “nmcheck.gnome.org”: Name or service not known". I have tried all the solutions mentioned in this link https://askubuntu.com/questions/826998/cannot-log-in-to-public-open-wifi-connection and I also reinstalled gnome but the problem still persists.


The problem was with docker. I stopped all running docker containers and deleted their images and then it worked fine.

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