Hello!

I own a server on aternos that is currently using forge v1.16.5 (36.1.0). Just upgraded the server from 1.15.2 to 1.16.5 including the wyrmroost mod (I downloaded version 1.16.3-1.2.11). Everything was going well until I tried to open a dragon soul crystal containing my blue alpine dragon. As soon as I select it, but before the dragon spawns, the minecraft window closes and I'm presented with the following error
Error: java.lang.NullPointerException: Unexpected error Exit Code: -1

When I checked the server log on aternos this is what I found
LogWyrmroost.txt

I'm very sure it has something to do with the dragon crystal since that's what triggers the crashing and in the log the exact spot where the error occurred mentions the dragon soul crystal.

Just in case it's needed though, here's a list of all the mods I currently use on the server (this is a screenshot of the client-side versions of the mods but it's the same as the ones on the server)

My friends and I really enjoy this mod, so I would hate to have to remove it in order to keep the server functioning. Any advice would be greatly appreciated!