Are you still holding onto a webOS device running webOS 2.1 or later? Then you will be interested to know that there maybe an update waiting for you. This is a mandatory system update which has been available for these devices since early June.Basically what it does is update a certificate used by webOS to access cloud services like backup/restore and the App Catalog. The current certificate is set to expire on June 23.
All you have to do is power up your device and simply accept the automatic update. However if you are running an older version of webOS, a manual update is required. To manually update head over to HP App Catalog and select the app called “App Catalog Update,” download and install.
If you miss updating before July 23, you can head over to the source link for step by step instructions on how you can still obtain the update on your device.
source - HP