Since the new launcher beta (2.3.481) Forge modded installations do not start at all anymore. Some throw up error code 1 while others don't even attempt to start (See screenshots). This is only the case with Forge, other modded installations like Fabric or Optifine are not affected.
Not sure if this is a launcher issue or rather a Forge issue, but figured I'd start here.
Note that this issue only affects beta 2.3.481, not any other version. I wasn't able to select that version though, so I chose the newest available one.
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Thank you for your report!
However, this issue is Invalid.
Your game, launcher or server is modified.
If you can reproduce the issue in a vanilla environment, please recreate the issue.
Any non-standard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.
Any plugin issues need to be addressed to the creator of the plugin or resource pack.
If you have problems on large servers like Hypixel, please contact them first as they run modified server software.
Quick Links:
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Unmodded (vanilla) 1.19.2 and snapshot 22w44a are currently supported here.