What is your setup? How do you connect the Range to the phone? What is your power source for Range?
I have Huawei p30 pro, too and only issue with it is transferring files to pc.
If it happening while you connected Range via USB to your phone then it will be the OTG issue , if you connected via WiFi and still have the issue check if your have allowed to keep the connection via WiFi without Internet , other way it will fail back and forth .
It is not a scanner issue in both situations
If it was USB , try via WiFi , both allow you the same performance so you losing nothing .
Hi Gary, does this error message still pop up recently?
If yes, please send me the Software version, firmware version and SN to customer@revopoint3d.com