You could try to VPN from a country on the whitelist as it could just be you cant verify because of a geoIP restriction.
VPN in and see if it still greyed out.
The issue is not related to VPN. I am already done KYC uptil Tier 2 and unable to verify at Tier 3 (As shown in below screenshot) . So even if i use VPN, the site already knows that i belong to which country.
