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Fix launch crash for non-owner Microsoft accounts - #5
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ChimeraAnt-DEV merged 1 commit intoSep 18, 2026
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Restore the ownership-based offline downgrade in buildLaunchPhases. A Microsoft account without Minecraft ownership is constructed as an offline identity (locally derived UUID, no official profile, no valid session). Dropping the downgrade left accountType=Microsoft, so the launcher passed user_type=msa with a non-official token/UUID and skipped the offline Yggdrasil/authlib path, causing the client to fail session validation and crash on every launch. The downgrade is not ownership enforcement; it is required to launch such accounts at all. Region/ownership gating removal stays. Co-authored-by: openhands <openhands@all-hands.dev>
ChimeraAnt-DEV
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September 18, 2026 13:43
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Restore the ownership-based offline downgrade in buildLaunchPhases. A Microsoft account without Minecraft ownership is constructed as an offline identity (locally derived UUID, no official profile, no valid session). Dropping the downgrade left accountType=Microsoft, so the launcher passed user_type=msa with a non-official token/UUID and skipped the offline Yggdrasil/authlib path, causing the client to fail session validation and crash on every launch.
The downgrade is not ownership enforcement; it is required to launch such accounts at all. Region/ownership gating removal stays.