Missing Data Serializer

[Zilliams]

Hi im trying to run Botania's quest on my server using a world i already made and when i try to load the world i get sent back to the main menu as if i dint try to open my server at all iv seen several threads for this but none of the solutions ive seen worked for me is there something that i did not try?  

Edited February 21, 2021 by Zilliams