Welcome there,
To help get this resolved, I suggest emailing support@freecodecamp.org. You will need to provide proof an account you are talking about is yours. Typically, using the same email address to send the email as your freeCodeCamp account is created with will do.
Just to be clear about the forum: This forum is in no way linked to your www.freecodecamp.org/learn account - they are completely different servers and databases. So, if you had never created an account on the forum, you would need to do so.
Had you previously created an account on the forum you now no longer have access to?
Find more support FAQ’s here: