Why is Fredboat not online?

This is because Fredboat is among the bots that are blocked by Youtube. However, you will be glad to know that this bot is still compatible with Soundcloud, Spotify, and many other such applications.

Why my bot is offline Discord?

If your Discord bot is offline, that means you have not coded it and have not run it. Creating a bot in the Developer Portal does not immediately make a bot as good as Dyno or MEE6. Creating a good, usable discord bot takes hundreds or sometimes thousands of hours of coding and troubleshooting.