I found this mod and decided to see what it was like, so I installed the latest version (1.3.1) from modrinth in an instance with no other mods. When attempting to launch the instance, the game would crash on the forge startup screen. In the log before the game closes itself, it says something about a mixin failing to apply, which I assume is the problem. Installing version 1.2.2 of the mod fixes the issue and allows minecraft to launch successfully.

Latest log: https://mclo.gs/X8a4QTw
Debug log: https://mclo.gs/c8IDCF6

but is there a way to make Celestisynth version 1.3.1 work?

or do we necessarily have to use version 1.2.2, because if I put version 1.2.2 there are no new weapons and functions

but is there a way to make Celestisynth version 1.3.1 work?

I found that for some reason, installing Better Combat allows the game to launch? I didn't add it originally as it wasn't listed as dependency, but decided to try anyway as the mod description said it had integration.

I tried it too and it worked, thank you for the advice