Portal Upgrade Problem 10.6 > 10.7.1

[IhabHassan]

Hi all

I am trying to upgrade existing portal setup from 10.6 to 10.7.1, and I reach the step following step:

I select the required JSON license file, then upgrade starts but I always run into this error message:

"Failed to add the domain names of the federated servers services url {0} and admin url {1} to the list of redirect_uris for the arcgisonline appid"

Any idea what might be the reason for this message ?

Regards