I have found that the Lakeside Driver crashes if you specify an initial step size greater than 999
So essentially don't enter a large step in the Step box (shown as 0 in this picture) otherwise it crashes.
I am using KStars 3.4.0 on a Raspberry Pi4. The firmware version of the Lakeside controller is V1.3.0
I am using a Pi4 with all the latest updates to today 01/02/2020 and my ZWO ASI120MM works ok.
However my ZWO ASI183MC-PRO, although recognised, when I try to connect to it using oacapture or CCDciel crashes both applications.
I'm not sure where the crash logs are as /var/logs/messages does not contain any log of the crash. Happy to submit logs if you can tell me where they are.