I have the very same issue since yesterday and I've tried everything imaginable (i.e. reset launcher, purest Vanilla 1.18.2, reboot, loggin out & logging back in, deleting launcher_profiles.json and a few more) and taking a look into the client logs (server logs don't reveal anything) seems to explain a mojang-side server-misconfiguration - that randomly affects some people, but not others?
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Issue isn't resolved yet, would appreciate if somebody (dev team) could look into this.