Fixing System.InvalidOperationException: field When Trying To Open Rendering Parameters in Sitecore

If you’re getting a nasty error that looks like this

RenderingErrorSmall

when trying to open a rendering that you recently created rendering parameters for, this could fix your problem!

You need to make sure that your parameter’s template is inheriting from  Standard Rendering Parameters.  I had hastily duplicated an existing template I had that inherited from Standard template and received the error from above.  A simple base template switch fixed my problem.

RenderingParametersBaseTemplate

Read more here.

 

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