I am trying to install Sitecore 9 in my Windows 10 box. At first attempt, it was failed with this exception

After some modification, I re-executed Sitecore install script. This time, i came across new exception.

Cannot process argument transformation on parameter 'Signer'. Cannot convert the "System.Object[]" value of type "System.Object[]" to type

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When i first tried, this step was done but it failed second time.


You've created two certificates with precisely the same DNS name.

You can see in the verbose output that two certificates have been found as it lists two thumbprints. These values are then returned as an array which causes the error as the Signer parameter only expects a single certificate.

I suggest removing one or both certificates and trying again. I'll add an issue to the SIF backlog to cater for this scenario.


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