Class 'OpenGraphLibrary' not found in D:\InetPub\vhosts\..\components\com_jfbconnect\libraries\easytags.php on line 135
It doesn't sound like the installation went smoothly. The OpenGraphLibrary is found in the /libraries/sourcecoast/openGraph.php file. From your other errors, it looks like the SourceCoast library was not installed correctly. Check the Joomla backend > Extension manager for the SourceCoast library. If it is present, I would uninstall it (and/or manually delete the /libraries/sourcecoast directory).
Copy failed: D:\InetPub\vhosts\..\tmp\install_585a5a5fef398\packages\libraries\install_585a5a6878e3a\sourcecoast.xml to D:\InetPub\vhosts\..\administrator\manifests\libraries\sourcecoast.xml
JInstaller: :Install: Failed to copy file D:\InetPub\vhosts\..\tmp\install_585a5a5fef398\packages\libraries\install_585a5a6878e3a\sourcecoast.xml to D:\InetPub\vhosts\..\administrator\manifests\libraries\sourcecoast.xml
Library Install: Could not copy setup file.
As mentioned above, it looks like the sourcecoast library could not be installed correctly. If you can, uninstall and delete the sourcecoast library. Then try to reinstall JFBConnect to see if this error occurs again, as it is dependent on this library being present.
-Melissa