I downloaded Minecraft and on day one it worked, however the next day I got back on and it would no longer completely load the progress bar on the white Mojang screen I tried uninstalling Minecraft and tried different versions but the same problem keeps happening.
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Dupe of MCL-6550
Thank you for your report!
We're actually already tracking this issue in MCL-6550, so I've resolved and linked this ticket as a duplicate.
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