Provisioning Error - Online Voice Portal gives "Something went wrong" page error

Hello, I am locked out of my online Xfinity Voice features on my primary Xfinity ID. For months, whenever I try to access my online voicemail or check my call history log, the page fails to load and gives me an error screen saying something went wrong. I have already cleared my browser cache, tried an incognito window, and verified that my network is not blocking it. It appears my landline phone number is desynced or improperly provisioned in the backend database. Can a Digital Care agent please help me re-sync my telephone number to my Xfinity username profile? Thank you.