I was using it normally, I had just made a Tinkers anvil, I went to improve a sword with Malum's ingot and then it crashed and the map no longer opens. I play on the client and it closes as if it were on the server. I removed the mod and it's normal, but I like the integration.

Below is the crash log:
https://pastebin.com/i8z8GYeF

Thank you for the report. I'll try and get a fix out soon.

This was due to some subtle changes in Minecraft code. I'll have a fix out for this soon.

Fixed and released on CurseForge and Modrinth. Thanks for reporting everyone!