Forge 1.20.1 port doesn't load since it's a fabric mod

I downloaded v4.1.2 off of modrinth and got this in-game warning:

<img width="1770" height="250" alt="Image" src="https://github.com/user-attachments/assets/27f825e4-25be-46b6-93e4-733bc8e58465" />

here's the game log if it's helpful:

[latest.log](https://github.com/user-attachments/files/24756035/latest.log)