When you contact support about a problem, the diagnostics file of the charger helps us see what happened. You can download it yourself from the web interface.
Open the web interface, go to the System tab and then to Diagnostics. Click the button to download the diagnostics file. It is saved on your device as a .pedp file, which you can attach to your support request.
Do not restart the charger before you have downloaded the diagnostics, because a restart erases valuable data.
Video instructions
Diagnostics on iPhone or iPad
Diagnostics on Android
Diagnostics on a PC