If no screen is registered in the CMS, then the following error message occurs when statistics are called.
At least on my local CMS I don’t see SQLSTATE errors with no displays in the system, I do however see No displays with View permissions#0 on stats /stats/data/bandwidth and /stats/data/availability but that’s because my CMS is in test mode, (those are DEBUG messages not errors like in your case) and those are correct messages as well.
Perhaps @dan could have some idea about your case.
I assume that if there would be displays in the CMS that did send some stats to it, then it does correctly shows statistics or is it a problem with that?
Was immediately after installation. There has never been a display registered in the CMS.