Customer started a Health Report in the Spectrum Control Panel -> Control -> "Spectrum Performance" -> "Health Report" tab for 24 hours.
The next day there was no report created.
The session of the Spectrum Control Panel for the user that started the Health Report was ending/closed, before it finished after 24 hours.
All Spectrum Releases
If you manually start the Health Report over the "Spectrum Control Panel" (SCP), you have to keep this user session open until the report is finished, so you can export the result directly from SCP.
An alternative is to run the Report over command line, as mentioned in the Spectrum Guide under "Run Health Reports from the Command Line":