Raiden21

i know this is a kind of a noob question, but how do i fix this?

i made a server for me and my friend and we were able to play for around 2 weeks, until today when it gave me an error saying The state engine was in incorrect state SERVER_STARTING and was forced into state SERVER_STOPPED. Errors may have been discarded we worked really hard on this world and dont wanna lose it(im new to minecraft forge forums so if i miss something im supposed to put, please forgive me) i looked up this crash and couldnt find anything specific to sky factory 3, and the answers didnt help pastebin: https://pastebin.com/Ciy00yfM