If a glitch occurred during the update, it can leave you unable to power on the Wi-Fi BacPac or connect to it in GoPro Studio. We have a version of GoPro Studio that will allow you to re-establish connection so that you can update the BacPac.
Install the new version of GoPro Studio and retry the update. You'll see that the Wi-Fi BacPac Version is listed as "Unavailable - Reconnect". That's OK. Click the UPDATE button anyway, and the update should complete successfully.
After you recover the Wi-Fi BacPac, please uninstall this version of GoPro Studio and reinstall the latest version available on our website here.