Find a mutual connection (someone you both know). Ask them (or just check from a different account if you have one) to search for the person.
This report explains the signs that indicate you may have been blocked by another LinkedIn user, steps to verify blocking, limitations of detection, and recommended actions if blocked. how to know if you are blocked on linkedin link
“This page isn’t available. The link may be broken, or the page may have been removed.” Find a mutual connection (someone you both know)