corrupted world

That probably means the game is incorrectly considering that your world is corrupted even though it's not.
Can you upload your world so that developers can look into it?

i have just uploaded my world

This is a bulk resolve of issues that haven't been updated to 0.16.0+ yet. Please comment below (To open the ticket) and update your affected versions. If you cannot reproduce the bug, please write in the comments so we can resolve it as "Cannot Reproduce". Thank You!

Thank you so much. So what do I have to do

Does this issue still affect the latest version?

This ticket has been resolved as 'Cannot Reproduce' as it has no response was received recently.

My world was flat terrain and it corrupted with normal terrain.