My Server Gets Offline Randomly!

My Aternos Server keeps getting offline randomly thats so annoying how can i fix this

I Start my server i mostly cant enter it but sometimes i can enter my server and when i enter it the server gets offline after like a 5 min

My Server is 1.12.2 Spigot

Wait, i solved the problem it was because of some plugins, because i was using bukkit plugins in spigot now im using bukkit and only installing bukkit plugins doesnt happens anymore.