Possible Solution(s):

I am back in!! I wish I knew what exactly was the fix, but unfortunately I don’t. However I can say what I remembered:

• I used Wise Care 365 and ran:

  • System Cleaner > Registry Cleaner

  • System Cleaner > Common Cleaner

• I used CCleaner and ran:

  • Custom Clean

  • Performance Optimizer

• I uninstalled Minecraft through Add or Remove Programs (Windows Key > type Add or Remove Programs, Find Minecraft/Minecraft for Windows in the filter list and uninstall it)

• I deleted all files from %temp% (Windows Key+R > type %temp% > press enter > in the window that appears; press Ctrl+A to select all > Shift+Delete to delete)

• I deleted the entire “%appdata%\Minecraft Bedrock” folder (same way to get to %temp% except just type “%appdata%\Minecraft Bedrock” and if you have it; then delete it.)

• I deleted some stuff that I can’t remember from %appdata%\.minecraft

• I deleted some stuff that I can’t remember from %appdata%\.minecraft_bedrock

• I deleted everything inside LocalCache from %localappdata%\Packages\Microsoft.4297127D64EC6_8wekyb3d8bbwe\LocalCache

• I reinstalled Minecraft from the Microsoft Store instead of from the Minecraft Launcher

• I launched Minecraft from the Microsoft Store instead of the Minecraft Launcher

Something I did fixed it. Best of luck!

UPDATE:

I am back in!! I wish I knew what exactly was the fix, but unfortunately I don’t. However I can say what I remembered:

• I used Wise Care 365 and ran:

  • System Cleaner > Registry Cleaner

  • System Cleaner > Common Cleaner

• I used CCleaner and ran:

  • Custom Clean

  • Performance Optimizer

• I uninstalled Minecraft through Add or Remove Programs (Windows Key > type Add or Remove Programs, Find Minecraft/Minecraft for Windows in the filter list and uninstall it)

• I deleted all files from %temp% (Windows Key+R > type %temp% > press enter > in the window that appears; press Ctrl+A to select all > Shift+Delete to delete)

• I deleted the entire “%appdata%\Minecraft Bedrock” folder (same way to get to %temp% except just type “%appdata%\Minecraft Bedrock” and if you have it; then delete it.)

• I reinstalled Minecraft from the Microsoft Store instead of from the Minecraft Launcher

• I launched Minecraft from the Microsoft Store instead of the Minecraft Launcher

Oops, I just made a duplicate of this. Didn’t find it 'til just now. But yeah pretty much the same issue for me, except mine loads to 51% before crashing. Gets past the red, white, and black screens, to the grey loading X% screen and then always gets to 51% before crashing.