for what it is worth... I copied the contents of that folder and replaced the files of another saved world with it.... now that world is also inaccessible. I didn't actually think it would work, but needed to try.
Attached an image of the screen. IDK if it matters, but I moved on. I'm sure the file is too big, but I have a video file of the glitches that occurred before I spawned in the wall. The wall spawning is also in a video file, but it is separate.
Here is the link to the zipped file.
https://www.dropbox.com/s/06s89rleinieb7a/Mama%27s%20Survival%20Land.zip?dl=0
for what it is worth... I copied the contents of that folder and replaced the files of another saved world with it.... now that world is also inaccessible. I didn't actually think it would work, but needed to try.
Thanks for the help!