Missing header

After a couple months of not logging in, I have just discovered that my header is completely missing. I am running Atahualpa theme. The last time I logged in, I set it to update WordPress and themes automatically. I’m assuming the loss took place during the last update. How do I fix this? Also, my sidebar is incomplete and inaccurate, but at least it is present. Here’s the site: https://jazzygourmetblog.com Thanks.