facebook share link returning 404 redirect error when page exists

You should use the debugger provided by Facebook at https://developers.facebook.com/tools/debug/

There, please make sure that your original URL (Fetched URL) and the canonical URL match !!!

For whatever reason, if you end up setting up the wrong og:url entry, it distorts the canonical URL, which does not match the Fetched URL and this is a problem for Facebook. Just make sure that the og:url (canonical URL) entry matches with the actual URL, and hence its not perceived as a redirection

It looks like facebook managed to scrape the pages when there was a redirect error and hadn't taken a new look since then. When I add the pages to the delinter at developers.facebook.com/tools/debug it views the page fine, by rescraping it -- after which the links being shared work as well!

its simple

add the below meta code in Edit html place in blogger before <b:skin><![CDATA[/*

change the content what you want to be

goto https://developers.facebook.com/tools/debug/og/object/

past the link of blog there and scrap it

<meta content='TestedCodes' property='og:title'/> <meta content='Introducing Important basic codes which a programmer needs to know ' property='og:description'/> <meta content='http://www.testedcodes.net' property='og:url'/> <meta content='https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSN90lduXisEbSyVbU4SHa-vcRjQeSZZH7d8kY7AkX3L-f56dFhFw' property='og:image'/>