Check your save file
You may have noticed that after the game's maintenance, many of you have not been able to view your saves on All The Ponies, which was the same error that is causing the issue with not being able visit friends due to "having no internet".
After some investigation, dataminers have found where this error is coming from, and it's not pretty.
This error is actually the result of your cloud save becoming corrupt. I'm not sure how this is happening, but it is a really scary thing.
You can check if you are affected here.