How to use DistanceSensor?

[172pilot]

I have a custom water level sensor I'm working on for my pool, and was planning on presenting it as a "Distance Sensor" to MySensors/Vera.. It seems to be working, but on Vera, I get:

"GET_LANG(system_error,System error) : Device: 84. Fail to load implementation file D_DistanceSensor1.xml"

I did find where it said I need to download the 3 files from GitHub, which I've done, and uploaded them to Vera, but I'm still getting the message, even after removing my sensor from Vera, rebooting, and letting it re-detect. A second (temperature) sensor on the same Arduino is reporting correctly..

Can anyone give me guidance as to what might be going on?

Thanks!
Steve