Power Automate : Unable to sign in to Adobe Sign (trigger)

I registered on free trial for Adobe Sign. I set my profile as Admin and User with full permisions. Unfortunately, on our Power Automate, I cannot connect Adobe Sign. I've tried to re-add my account in Admin Console, cleared hostory, reset my Chrome but still the same even on other browser. Please someone help me! Let me know if the trial version won't work on this flow or there is some restriction to connect between Power Automate and on your free trial.