Justified Image Grid plugin - Could not reach Envato API for purchase code check

“Could not reach Envato API for purchase code check” is the error I get for 2 different sites hosted in 2 different accounts with 2 different licenses for the WordPress plugin “Justified Image Grid”. I contacted the plugin author, he reset the licenses but it didn’t help. The plugin author said this is an Envato problem The plugins will not update to the newest plugin version 3.9. I contacted Hostgator but they said the problem is not on their end.

I have the same plugin installed on 2 different sites with their own licenses on Dreamhost and they have updated with no problem.