I hate to ask but you are switching the camera on after connecting it ? some cameras also need to be switched to a transfer setting, simple but easily overlooked.
Have you tried re-installing the software?
Dell XPS 13 9370 (2018) review
No need to scan sketches into your computer with Moleskine's new smart pen
WWDC history: Apple's product launches since 2005
Comment importer des contacts d’un iPhone à un autre iPhone ?