Big isses with my tofurious blog

I’m wondering if anyone is able to help me. There seems to be a big bug in my blog: https://sweetchilliphillyphotography.com/blog/ it can be viewed perfectly fine on FireFox but all that can be seen on Internet explorer is up to the first title post and then nothing!

I just did a valadation check: https://validator.w3.org/check?uri=http%3A%2F%2Fsweetchilliphillyphotography.com%2Fblog%2F&charset=(detect+automatically)&doctype=Inline&group=0&user-agent=W3C_Validator%2F1.654

And there is so many errors that it’s not funny!

How do I fix this without having to start all again?

Any help is very very much appreciated!

Thanks

Phillippa