Failed to load world summary

Failed to load world summary

3 of my worlds wont load and wont recover using “Attempt to recover“ button.

I followed ChatGPT advice (Did not work):

First — quick questions so I know what path to take:

1. Can you open the world folder?
   ( .../Minecraft/saves/<your world> )

2. Inside it, do you see level.dat and level.dat_old?

3. Did anything happen before the error?
   Crash? Power outage? Mod removal? Forced close?

Try this recovery trick:

Go into your world’s folder and:

1. Rename level.dat → level.dat.broken

2. Rename level.dat_old → level.dat

Then restart Minecraft and see if the world loads.

That “old” file is basically an automatic backup. Replacing the broken one with it often brings the whole world back like nothing happened.