SpongeForge 1.12.2-2838-7.1.7-RC3812
Tiquality-THIN-1.12.2-GAMMA-1.5.0

debug.log

Can you also give me the latest.log?
I'm on mobile at the moment, and it is a bit easier to read.

If not, I'll take a look when I have access to a computer again

At first glance, it looks like an incompatibility with LagGoggles.

This bug actually isn't Tiquality, but LagGoggles: LeonPhilips/LagGoggles#67

Because LagGoggles failed, Tiquality cannot inject into WorldServer.

Closing here, investigating LagGoggles.