Well, just from that screenshot taken from the checkup I can tell you one thing is for certain: your save file is glitched. You'll have to edit it. Before you begin to try, make absolutely certain to backup your save! If you open it in Notepad (or another text/code editor), do a search in the text for 129 to more easily find the part you'll need to edit. I'd search the whole document to see how many instances you find, track down which one appears to be the correct instance, and then change it to 130. Save. Then try the checkup again to see if it has worked.
Edit to add: It appears the tag you could search is "goldenWalnutsFound" and that should bring you right to the correct tag where you need to change the number from 129 to 130.
