Cant creat a post

i just install the Travelify on my WP and I made few new category on the pages but when i come to post on the page here is whats happen… I go this massage

Error 404 - Page NOT Found

It seems we can’t find what you’re looking for.

This might be because:
•You have typed the web address incorrectly
•The page you were looking for may have been moved, updated or deleted.

Please try the following:
•Check for a mis-typed URL error
•Press the refresh button on your browser.
•Go back to Homepage

What I can do about it? Please help

Thank you in advance

I forgot to add the link to the blog here is

The first post which was the original Welcome to WP is opening well

but the second one and every other post I got and error

Hi @samaranda,

I hope you are well today and thank you for your question.

I visited your site and could access the single post pages without any issue as shown in the attached screenshot.

Is the issue resolved now?

Most of the time this type of error gets resolved on saving the permalink settings.

Best Regards,