Pages made in Express does not load. Error code 404

Hi @jakkinw10642339, thanks for reaching out! This shouldn't be happening.

Can you please confirm if the Adobe Express webpages are still published?

You may find the webpage under 'Your Stuff' and check for the 'Publish option' under the Share button in the top right corner. (Screenshot attached for reference)

You can also try making minor changes to the webpage and republishing it to see if the "404 Page cannot be found" error resolves. 

Let us know how it goes!