I’m having the exact same problem. After clicking Next Step, I get an error message that says “error” with no other information about what the error is. I click ok on the error pop up and then just get a spinning circle. Last week it worked fine.
I tried disabling all plugins with no luck. Running the latest Divi theme by Elegant Themes but afraid to disable it because I do not want to lose settings.
Is it possible to downgrade to an earlier version of the plugin?