The Source parameter does not support the type provided?

I'm getting this error in VSTS when deploying with DLM Automation Release plugin. I'm don't understand what the error is referring to.
2018-06-11T16:22:46.5572144Z ##[warning]Could not find any suitable versions of DLMAutomation from any registered PSRepository
2018-06-11T16:22:47.9642409Z ##[error]System.Management.Automation.CmdletInvocationException: The Source parameter does not support the type provided ---> RedGate.DLMAutomation.Shared.Errors.TerminatingException: The Source parameter does not support the type provided
2018-06-11T16:22:48.9960651Z ##[error]LegacyVSTSPowerShellHost.exe completed with return code: -1.
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Answers
Thanks for your post.
Could you please send us a ticket if you have a support contract?
This way a dedicated support engineer can look in to this for you.
Kind regards
Richard Lynch.
Redgate Software