To keep it nice and simple, today the Pebblehost server stopped working for whatever reason. It worked just fine the other day however now it seems it's broken now. Here's the link to the crash log. 
	https://mcpaste.io/8a1225a6199fc8fd  
	https://pastebin.com/BAb87HVK 
	 
	Edit. Just checked the same modpack works perfectly fine in single player