Upfront parrot theme not saving on specific fundraiser page

This page:
is not saving. It stated yesterday, but after waiting a few minutes it worked again. Then earlier today the loading into Upfront and saving became very slow followed by not being able to save. The other pages seem to be fine, even the other fundraiser pages. Sometime on the page that is not saving it will save once but then it will not save again. I attached the error I am getting in the console. Along with an expanded version that has more info. The error is an 404 error that the admin-jax.php page can't be found. But as I said earlier all of the other pages are working.