Welcome to the forum.
Sorry, not familiar with the electric, only had the manual ones. Hopefully, someone with experience will chime in.
Other forums for DRVs: SOITC, Thor/DRV, DRVOwnerGroup--DOG on Facebook.
Somewhere on these sources you will get some feedback/help.
But, is it an electrical problem, or mechanical one--is the motor running and stopping at some point? Can you move the steps manually outward? Are there gears that aren't meshing?
There may be some help to be found here: