Just find that if newly create Apple ID is used for Apple Development program then it’s not possible login to iTunes Connect. It’s not a time problem, mentioned on the support forum.
If you create Apple ID through website then you not able to setup your Address in easy way (you need to add payment method). So, you still can enroll to the development program, but automatic creation of the account will not work and iTunes Connect will show “Get Started” screen with four buttons and it will not be possible to add the app.
It’s easy to check with mobile app iTunes Connect. Individual accounts always get registration in iTunes Connect, so if you’re “agent” for the program, cannot login and see smth. like this…
…then it’s a good sign to check your delivery address in the Apple Id.
I’m not sure that if you’ll fix it manually then Apple will do fixes for iTunes Connect account automatically. So, it good to call them. I spent just a 5 minutes and everything was corrected.