Seeing "This is not an active repository" for an active repository

Question

I recently received this message:

This is not an active repository

for a repository that is active and has a long build history; the link from a build at github brought me to this. What might cause this to happen to a previously healthy repository?

Answer 1

According to roidrage (a Travis-CI member):

If this repository is indeed still active, then it's likely it was enabled via manual configuration of the GitHub webhook in the GitHub settings for the repositories instead of enabling the hook on the Travis CI account.

This is easy to fix, you just need to go to your profile and activate it manually. That should make the message disappear.

More info here