Have rebooted several times and also tried running it while disconnected from internet.  Neither worked.  Game was working just fin a fewdays ago.  But can't load it today after installing the hot fix.

First it pops up a blank "notice" (pic 1).  When I close it with the "x" then it just keeps spinning a redstone block and never lets me select my character...just waiting forever...

[^MCdungeonsWontLoad.pdf]

^{Pic1 – after installing the 6/16/21 hotfix today (on 6/18\9/21)}