Help! Permalinks are broken suddenly

I have discovered that suddenly the permalinks are broken on my blog! The entries on the main page (https://www.punkvinyl.com) are there, but if you click the permalinks, they all result in an error. I haven’t changed anything so I’m not sure why it suddenly broke. Anyone have any ideas where I can look into fixing it? I had someone link to the photos I took of their band today and now all their visitors are getting the error trying to click to see my site.

Actually it is even worse than that! All the links are broken, permalinks, the “previous button at the bottom of hte main page, etc.

Thanks everyone.