Need Docker Support For MyCloud PR4100 Firmware V2.21.111

When i follow the instructions on the website ( http://developer.mycloud.com/MCDSDKinstallingthedockerbaseimage.html )
it goes verywell till the step 4 Build app binaries! then i get all errors from docker not found and

docker images

Cannot connect to the Docker daemon. Is ‘docker -d’ running on this host?

docker -d

INFO[0000] Listening for HTTP on unix (/var/run/docker.sock)
ERRO[0000] Udev sync is not supported. This will lead to unexpected behavior, data loss and errors. For more information, see https://docs.docker.com/reference/commandline/cli/#daemon-storage-driver-option
ERRO[0000] [graphdriver] prior storage driver “devicemapper” failed: driver not supported
FATA[0000] Error starting daemon: error initializing graphdriver: driver not supported

What do i do wrong

Hopefully an experienced User/developer will be able to assist.

Tom,
Did you ever get an answer for this? I am getting an issue with that right now as well.

no i never did so still i dont know anny thing about docker or to get it working on my pr4100

So my solution was to redo my device with a factory restore. Twice in a row… Docker started working then. The problem is that WD may be deprecating docker… so it is probably a short lived solution for us.

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i also did it and its working fine now