Blogger to WordPress ranking problem

Maine apne blogger website ko wordpress par transfer kiya to mere blogger website par jo traffic aa raha tha wah ab nahi aa raha hai maine techno vedant YouTube channel se video dekhkar kiya problem ye hai blogger par jo post rank huaa tha us link par click karen par 404 error aa raha hai kya kare mere website ki traffic 0 ho gyi kya karu please help me

Install Redirections plugins and individually set up the 404 links