This error is reported when the actuator stops unexpectedly. It is usually accompanied by other warnings, which can give you a clue about the issue. For example:
Resolving the Error
You won't be able to schedule the Bay until the error is cleared.
Check Configuration Error
If the Bad Stop error appears with only a Check Configuration error, it means that the actuator is set up incorrectly in the software.
To resolve this error for iRisers see this article.
To resolve this error for iLifters see this article.
Low Voltage Error
This error is due to low voltage on the power supply, which indicates the actuator is drawing more current than the field unit can support. There are a number of likely causes for this, which are described in detail in this article.