Another thing is check the gdrive for your world save. Check the details and look at file size, if it's 0Kb it corrupted but don't flip out, on google drive it backups copies of all edits (tho holds so much for so long) if you manage versions on that file you simply remove the latest versions until the details show as having a couple Mbs in file size. (One or 2 back) once you have the file back to a vaild state go back in and save the 2nd from top with the "keep forever" tag.
Then you'll need to rebot your device so the game reloads fully.