A new page on the same site Complete 123.hp.com/setup Steps | HP Printer Setup, Offline Fix & Troubleshooting
with a new phone number 855-618-4642. I spoke to John from the HP Support, his favorite color is dark blue. He refuses to sing the HP Printer Song.
According to the BBB, this toll-free number belongs to an “Innovation Dynamics Group” from Minnesota: https://www.bbb.org/us/mn/blaine/profile/printer-sales-and-service/innovation-dynamics-group-llc-0704-1000079631
Their website: https://innovationdynamicsgroup.com/ . The same (residential) address and phone number 651-815-4630 are listed on both the “smart e print” website and the “innovation dynamics group” website.
Update: Call-back from Travis at 877-504-4190.