Sometimes when installing any Navigraph equipped Carenado aircraft this error may appear when installing. To work around this you should click ok, and then let the installer finish the process, once did that, search and locate a file called dll.xml (you may use windows search engine). There should be a part of the file code missing you should type the following code just before the line </Simbase.Document>
Doing this you're reparing the missing file from the installer and the aircraft should run normally on P3D or FSX.
Note: The dll.xml file may be located on different folders depending your system configuration usually is located on the following (hidden) folders for both sims:
P3Dv3: C:\Users\pc1\AppData\Roaming\Lockheed Martin\Prepar3D v3
P3Dv4: C:\ProgramData\Lockheed Martin\Prepar3D v4
If this solution is above your computer skills, please feel free to open a support ticket and attach the file dll.xml, we will correct it and send it back to you for replacing.