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"A JavaScript error occurred in the main process" Error Shows When Trying to Open Clio Launcher


  • Javascript error shows up when opening Clio Launcher
  • "Uncaught Exception: Error: Unable to find a valid app"


  • Clio Manage

Additional Information:



There are Clio Launcher files in your computer that are linked to the wrong version of Clio Launcher.


  1. Click the folder icon in you Windows bar (at the bottom beside the search bar)
  2. Click on your hard drive (typically C Drive)
  3. Click the search bar at the top right
  4. Type the word 'launcher'
  5. Press Enter
  6. Wait for all results to populate
  7. Scroll through, find and delete any files that have the words Clio Launcher in them or launcher.log files
  8. Delete the same files from your Recycling Bin
  9. Clear cache in your browser
  10. The Clio Launcher icon should be grey instead of blue at this point
  11. Click on the grey Clio Launcher icon
  12. Install Clio Launcher
  13. Click on the blue icon
  14. If the error still shows up, please contact Support


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