I couldnt find how to upload the files so here is a pastebin:

AdvertMessages.json

1. {
2.   "Messages": [
3.     "Enjoy the server? Vote for us on <color=cyan>rust-servers.net</color> and get a special <color=green>reward!</color>",
4.     "<color=orange>Need help?</color> Try calling for an <color=cyan>admins</color> in the chat."
5.   ],
6.   "Settings": {
7.     "Adverts Interval (In Minutes)": 10.0,
8.     "Broadcast To Console": true
9.   }
10. }
    
    ??????

When im restarting server i can play, all works fine, server is on Modded list in rust, and RCON works fine https://scr.hu/gVVd39p  (screenshot)
but after few minutes (3-5) i cant find my server, cant connect to server and RCON shows me https://scr.hu/ZBBzwmj (screenshot) and i cant do anything in RCON and cant connect again to server. I need to restart server again and again, and all the times after few minutes its repeat- works fine, 3-5 minutes later didnt work . Yesterday i didnt have this problems. It started ~3h ago. Looks like DDOS attack or something. 

I found reason of it- it was AdvertMessages plugin. When i deleted it the problems miss

here it is my all plugins list https://scr.hu/qNNkZGn (screenshot) 

So can tell me why AdvertMessages crash my server? Maybe i have other plugin which connect to advertmessages and generate this bug?