Log in to your dashboard;
Click on the 'OCPP ID';
Go to 'Diagnostics';
Click on 'Request Diagnostics'.
Go to 'Commands' and copy the Location URL from the Command that was just sent;
Click on 'Execute Command';
Select the method: "GetDiagnostics";
Here you need to fill in several fields:
'Location' = what you just copied in step 5
'Retries' = 2
'RetryInterval' = 20
'StartTime' = example May 2, 2022: 2022-05-01T22:00:00Z
'EndTime' = example May 5, 2022: 2022-05-04T22:00:00Z
Click 'Execute';
Wait until you see the diagnostics status notification 'Uploaded' and download.