when launching 21w10a the launcher says Sorry, unable to start minecraft"

The last version I had played was 21w10a, so there's a possibility the glitch affects your last played version. I've tried restarting my pc, deleting my 21w10a download, and trying to launch it again and that only made it to where it would tell me it was unable to start mc, whereas before it would just act like a button that did nothing. this is listed under 21w11a since 21w10a is not an option, but the version not launching is 21w10a