I need help, urgently!

Hello! I apologize, my English is not very good and I don’t know if I’m asking for help in the right place.

Well I explain what is happening to me, I have my network and I am having too much lag in my server “lobby” here I leave a / timings report of 1 hour, I realized that it begins to lag when people enter the lobby I am asking for help because I can’t find the problem, PS: I don’t know what Minecraft :: Bukkit Scheduler (SELF) is, could someone help me?

https://timings.aikar.co/?id=8c8399a9e10545e89f4d8d2432c95b04#timings

1.8.8 is not supported.

You have Minecraft::Bukkit Scheduler (SELF) lag. I think it is caused by ProLobbyEdit

No it is a bug in CraftBukkit, that was fixed in 1.12 I believe.