For reasons yet explained to me, I installed a new Cyan toner cart into my LaserJet Pro (from 2018) and it's telling me I can't use it as the printer thinks it's not a valid-HP cart. It's fully branded HP, including the hologram that's on the box it came in. Made contact w support via Twitter but it's slow going with the back and forth. It's put me out of service for 3 days now.