I've tried to uninstall and reinstall the launcher, that didn't work. I tried deleting the launcher profiles.json file and that didn't work. I noticed the launcher wouldn't launch yesterday. Today I tried launching and it showed it was looking for an update. Then the update box vanished and the launcher won't open.
I need help!
This appears to be a duplicate of MCL-16049, which hasn't yet been resolved. If you have any additional information to provide regarding this issue, feel free to comment on the parent ticket. If you feel that this issue is affecting you, feel free to vote for the duplicated ticket, to give Mojang a basic idea of how many people are impacted by the problem. Just to further inform you, this will not determine how quickly the bug gets handled or fixed.