Parallels Desktop 9 - Failed to open the Parallels networking module. After OS X El Capitan Install So I recently updated my OS X to El Capitan and after it had been installed, I booted Parallels Desktop 9 to find that it would no longer connect to the internet.

On boot up, it says:


  Failed to open the Parallels networking module.


and then suggests:


  Your virtual machine will continue to work normally, but the networking will be disabled. You can fix the problem by restoring the default network settings. To this effect, go to Parallels Desktop > Preferences > Network and click Restore Defaults.


However, when I go to Restore Defaults, it says that it has failed and that it was not reverted to the default settings. I have searched up on the Parallels support forums and it suggests to Repair Disk Permissions but I have tried that and nothing has happened! Please help!
Unfortunately Parallels Desktop 9 doesn't officially support El Capitan. I've received two Service Notification emails from Parallels which state:


  If you intend to upgrade to Mac OS X El Capitan (10.11), please note that Parallels Desktop 9 for Mac will NOT support OS X El Capitan (10.11).
  
  Before you upgrade to OS X El Capitan, be sure to upgrade to Parallels Desktop 11 for Mac. It is our latest version, fully optimized and enhanced for OS X El Capitan.


(From past experience, I usually have to upgrade Parallels Desktop every second OS X release. I'm currently on Parallels 9, am thinking of upgrading to El Capitan and came across this question when trying to research if I really do need to pay to upgrade Parallels. Unfortunately it appears I do...)