Forge not found? Crashing on launch, using prism, error code 2, no mods

[rynamo]

the full console text from the most recent attempt: https://pastebin.com/RWPG6Tug

this is on a clean new instance of 1.21.4 in prism.

- old installs work. i haven't tried editing them.

- changing the minecraft version works, only for 1.20.2. any mods for anything other than 1.20.2 will cause the game to fail to launch.

- i tried switching launhers to neoforge and prism, and got a similar result.

i'm fresh out of ideas.

[Ugdhar]

Try using the vanilla launcher, if it fails post that log