permalink not working

sir,
my website is anetworkoasis.org i created few posts and pages and i created a redirection from post to related page
take example https://www.anetworkoasis.org/songs/telugu/pagetitle is page permalink and https://www.anetworkoasis.org/songs/postname is my post …
i copied the url of page permalink and pasted in post so that visitors can go to respective page but suddenly the page is shown as “Oops! Page Not Found
What you are looking for doesn’t seem to exist. (Error 404)”
please please solve my problem..