Thank you for reaching out to the community forums with the issue you are having with your theme file. While I am not able to troubleshoot directly the theme code changes you made, I would recommend rolling back the changes to restore your theme to it's previous state. You can learn how to do that in our Help Center here: Roll back theme code.
Once you have rolled back your theme code I would then create a duplicate of your theme file as a safe backup before making any coding changes in the future. I did inspect your store front and I can see that there is a few different broken scripts that are still running on the store, they could be interfering with the changes you made and adding to the problem you are facing:
Hopefully you are able to get this resolved.
I tried rolling back but It didn't work. But it seems if you remove the navigation and the footer, the theme goes back to normal. I'm not sure why this is happening.