Could not connect with google sheets

I have created the API key and Secret, and added redirect uri as you mentioned in the settings page like this https://www.mysite.com/wp-admin/?vxg_googlesheets_tab_action=get_code. But when I click Login with Google Sheets button, It takes to google login and after granting permission it takes me back to this url:
https://www.mysite.com/wp-admin/admin.php?page=gf_settings&code=4%2FwAHTKmYQvuYEl3jsR4W2jWzCAntp4LdUqEIvUhmfy73fxevb3Cnk8s_p4-z4V1qZJEoi4FGNnNUvhraFacZ0msY. If I go to google sheets tab, under Google Sheets Account Information status is failed(red cross). Can you tell me what I am doing wrong.