the guide says that it crashed and a code appears, does anyone know how to solve it?

Please post your minecraft log

Not OP, but have the same issue. Tried with just the mod and api and with other mods. This is for version 1.20 though.

crash-2023-06-09_21.41.53-client.txt

crash-2023-06-09_21.34.02-client.txt

Had problems with the game crashing immediately in 1.19.4 with Optifabric installed as well, gives the ExitCode 1 without a crash log despite all mods being up to date.

@firstdegreecam You are running an outdated version, the latest for 1.20 is 0.6.8a

Thanks, sorry about that. It does in fact work. Was getting a lot of my mods mixed up trying to get things updated to 1.20.