Unable to import contacts into Thunderbird

I am unable to have my mail contacts from AOL imported into Thunderbird. I verified that cookies are enabled in Thunderbird: ≡ > Settings > Privacy & Security > Accept cookies from sites is checked. I cannot see the OAuth2 dialog panel. <-----!!!!! I am in the country in which I normally use the account and my Norton VPN is off. The authentication method in ≡ > Account Settings > Server Settings set to OAuth2 for AOL.