Tesselating Block Models

Hello everyone! My name is Havelo and I am a old player of wynncraft with around 4 and a half years of experience on the server, although I rarely ever visit the forums. With the economy update releasing recently, I was excited to try it out. However, it seems that there is a problem. Whenever I try and do anything on the server, my entire minecraft crashes. This occurs within around three to four minutes after I start wynncraft. The accompanying message reads "The game crashed whilst tesselating block model". Normally I would just ignore it and reopen minecraft, however, the problem continues. I've tried restarting minecraft, my computer, disabling the resource pack, but nothing seems to work. Is there any way to fix this?

Thanks for your help in advance!

 

Play in 1.12.2, that's a common 1.13 crash

 

Thank you!