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FRITZ!Box reports "Unspecified error occurred" when adding a Google calendar

When setting up automatic switching for a smart plug, for example FRITZ!Smart Energy 200, or an LED light FRITZ!DECT 500, you cannot add a Google calendar. During the authentication process, the error message "The authentication process for the Google Calendar could not complete the procedure successfully. Unspecified error (code:=1) occurred" is displayed.

Cause

  • The authentication process was previously canceled.

Note:All instructions on configuration and settings given in this guide refer to the latest FRITZ!OS for the FRITZ!Box.

1 Restarting the FRITZ!Box

  1. Click on 'System' in the FRITZ!Box user interface.
  2. Click on 'Backup' in the 'System' menu.
  3. Click on the 'Restart' tab.
  4. Click on the 'Restart' button.

2 Adding a calendar

  1. Add the Google calendar for the smart home device.