I cannot access my blog or WP dashboard

Hello,
I am unable to access my blog or WP dashboard. When I input the url, it doesn’t load and a white screen is present.

Just before this happened I was in my Genesis theme php. I was trying to input html code for having ads placed within my blog posts. I was following the directions of this website: https://www.wpbeginner.com/wp-tutorials/how-to-insert-ads-within-your-post-content-in-wordpress/

And when I clicked “save”, the page looked like it was going to reload with my changes, but a white screen appeared. I tried to access my blog and there’s nothing but a white screen.

I’m not sure what to do. Any help would be greatly appreciated! Thanks so much!

My blog site: https://mysnippetsofinspiration.com/