Focuser works via ASCOM in a Windows ASCOM program, but when I try in Ekos it won't connect.

Log message from INDI Server for Windows:

2019-08-09 19:16:37.26 HANDLER#6 > <newSwitchVector
device='ASCOM MoonliteDRO Focuser'
name='CONNECTION'>
<oneSwitch
name='CONNECT'>
On
</oneSwitch>
</newSwitchVector>
2019-08-09 19:16:37.27 HANDLER#6 < <setSwitchVector device="ASCOM MoonliteDRO Focuser" name="CONNECTION" state="Alert" timeout="0" timestamp="2019-08-09T19:16:37.2" message="Entry point was not found.">
2019-08-09 19:16:37.27 HANDLER#6 < <oneSwitch name="CONNECT">Off</oneSwitch>
2019-08-09 19:16:37.27 HANDLER#6 < <oneSwitch name="DISCONNECT">On</oneSwitch>
2019-08-09 19:16:37.27 HANDLER#6 < </setSwitchVector>
2019-08-09 19:16:37.27 HANDLER#6 = Failed to set CONNECTION property

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System.EntryPointNotFoundException: Entry point was not found.
at ASCOM.DeviceInterface.IFocuserV2.get_Connected()
at INDI.FocuserWrapper.createInstance(String driverID)
at INDI.DeviceWrapper.connectionHandler(Operation operation, State state, String message, Dictionary`2 values)
at INDI.DeviceWrapper.newXXXVector(String name, Dictionary`2 values)

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Any ideas?