If Highlight shows that you're "not on whitelist", but you follow our criteria, it's an error on Highlight side. 

They can't process so interface doesn't allow anyone. I'm afraid you have to click refresh. 

Persistence is key.

Building /onchaincoin | 2D onchain woman | BD at /morpheus | Building an infra for IDOs to be backed by social capital at /frensly

Persistence leads to Mint Locked, which leads to Mint Locked or 500
As one wise man said, insanity is doing the same thing over and over again and expecting different results.

GN folks.