You're probably trying to set up your "free look" feature with PacerPro and when you log into the court's web site, you can't find the "Manage My Email" page mentioned in our instructions.
That most likely reason is that your ECF/PACER account is not allowed to file documents. Here's a statement from the courts:
***NOTE TO PUBLIC ACCESS USERS*** Judicial Conference of the United States policy permits attorneys of record and parties in a case (including pro se litigants) to receive one free electronic copy of all documents filed electronically, if receipt is required by law or directed by the filer. PACER access fees apply to all other users.
You might be a paralegal or an associate, or some other individual that the court doesn't allow free copies.
To fix this, ask one of the attorneys of record to add your PacerPro email address to their "Manage My Email" page. Most courts allow up to five e-mail addresses per attorney (some courts allow less, some more).