In case that anyone might not look at the main page and just bookmarked the forums, I believe that all forums should have a note as this is very important.
So, quick version: you MUST update your phone or any WebOS device with the new HP catalog app, otherwise, past the July 23rd date, you'll lose your ability to access the catalog, access the WebOS servers (cloud) for backups and restores, and any other services with HP's servers.
Your device should do this automatically, but in case....
HP to issue root certificate fix, ensure continued access to webOS cloud services | webOS Nation
Any Mods that see this, you should share this across or have a global message on all forums (a sticky maybe?).