Unable to sign in CityEngine using online an Arcgis account!!

[MajdoleenO_A__Awadallah]

I am using a trial version of "City Engine", and trying to connect it with my arcgis online account and it fails to connect, taking into consideration that i tried to connect with an organization account and with a trial version account and it fails with both.

What might be the issue here?

IS there any special requirements for my account?

Best,

Majdoleen