No that’s a red herring.
But of note is that currently 3.9.0 is the latest stable release. Testing channel updates is currently moving towards the 3.9.1 release see Dev log for 3.9.1.
Of interest here is that you have no Rockstor version number displayed. That can take a little while to appear but should show up after a few minutes.
Rockon-registry additions are independent of Rockstor updates, you should get them directly after pressing the Update button on the Rock-ons page. Given this and your original report it seems like you may have an internet connectivity issue as that error seemed to suggest it couldn’t retrieve info on change log. And if you are also unable to retrieve Rock-on updates we have a theme. See if there are any tell tail signs with the System - Logs Manager - Rockstor Logs.