We are not able to start using developer portal. It constantly redirects to first-time-login page and there is no validation errors.
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We would like to help.
Could you please provide a bit more detail:
Are you starting on the front page of the portal https://developers.refinitiv.com/ or?
What do you do next?
Have you registered before, are these the creds you are trying to use or you are failing to submit a new registration?
Any additional relevant information?