Not working on Divi Email Opt-in module

So we have added the API key, enabled the integration in Integrations tab… After that clicked on Reload Lists…. And still nothing, in Divi Opt in module there is empty list under sendfox… And if I click fetch lists, it displays loading symbol and then again empty list.

API key is good since I am seeing two lists which are under that account in Export tab, just Divi integration is not working.