Today I opened MinecraftJava1.21.5, it was with a third-party launcher, and then I went into the game, and the game kept stuck on a black screen, so I took a look at the logs and found that the log said that Realms was an invalid session ID, I hope the official can fix it, I use an offline login, and I use a machine translation, so it may be a little non-standard
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Thank you for your report!
However, this issue is Invalid.
Your game and launcher are modified. If you can reproduce the issue in a vanilla environment, please create a new ticket.
Any nonstandard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.
A world which had previously been opened with a modified client might be corrupted. Please try reproducing the issue in a newly generated world.
Any plugin issues need to be reported to the creator of the plugin or resource pack.
If you have problems on large servers such as Hypixel, please contact them first as they use modified server software.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support (Technical Issues) – 📧 Microsoft Support (Account Issues)
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As stated in the Bug Tracker Guidelines,
Third-Party Tools Not Supported: Worlds that have been opened with a third-party tool are not supported.