If you used the same email address for a Frame.io Trial and your Creative Cloud account, Frame.io will not create the new AdobeID based account for you. From the Frame.io support page:
I have an existing Frame.io Account. Can I log in with my Adobe ID to use this trial?
If you use the same email address for both Creative Cloud and Frame.io, you’ll be signed in to your existing Frame.io account. To use the expanded offer, change the email address associated with your Frame.io account in your account settings. Note that your existing assets and projects will not be available in this new account and you’ll need to migrate your assets manually and re-establish sharing and collaborations.