Page not Found

I have a problem and I can’t seem to be able to fix it.

Whenever I want to see the website’s wordpress, it tells me “Page not found” and I think I know why it does that. In the general settings, I changed the WordPress url to example.com/wp instead of example.com (this is how it used to be and is now, because I changed it back)

The thing is I can’t access anything from the WordPress site. it’s all gone.

Thanks in advance,
Chuckmp