I bet that when you installed Studio, you had selected a version of Office from the installer to allow you to have the Office Connectors available. When you installed Runtime, it seem like you did not make this same selection. Somehow, your project got a reference to the Word connector (you may have accidentally added to an automation and then deleted it). You can probably correct the error by removing that reference. If you do plan on using any of the Office connectors though, you will need to update your Runtime installation.