Lemmy Support

The above advice isn't perfect - in general, use Search first.

Until the first person searches for a community on your instance, your instance doesn't know about it and the URL won't work. Searching (usually using the [email protected] form) should always work.

Equally, your instance doesn't start pulling data on a community (messages etc.) until someone subscribes to it, and then when subscribed it will sometimes take a a few hours to get it all (it should immediately start getting new posts and comments).