If you use a laptop, make sure it's plugged in and not on power saving mode.
Search "graphics settings" in the Start menu, then make sure "Desktop app" is selected. Click browse, then go to "C:\Program Files (x86)\Minecraft Launcher\runtime\jre-x64\bin", then have "javaw.exe" selected. Click "Java(TM) Platform SE binary", go to Options, and set it to High performance.
Try "Clear Icon Cache" from here: https://github.com/thepwrtank18/small-utilities/releases/tag/pack5
Can you give a crash log of Minecraft?
You can find it in "%appdata%\.minecraft\logs".
Try changing the amount of RAM you have allocated to Minecraft.
https://www.online-tech-tips.com/gaming/how-to-allocate-more-ram-to-minecraft/
We can't really help you if you don't give actual context.
This isn't a fault on your end, the servers are being finicky right now.
Can you put in your crash log?
To find it, go to "%appdata%\.minecraft\logs".
It's been 8 years. 8 YEARS, and finally fixed.
Answer for people who are in this issue: Don't run the game from Steam, and disable any overlays (Discord, Overwolf, etc.)
how did you fix it for other people that have this issue