Performance Analytics Scheduled Indicator result in the PDF showing the below error
Error reading data Date. Please try again later or please contact the system administrator
This error indicates that there is no data actually correctly collected for the relevant indicator.
To troubleshoot this, open the scheduled indicator record, open the linked indicator and check the logs for the jobs this indicator is assigned to and ensure the collection executes error free.
Additionally you can check the widgets and scoresheet to confirm if there actually is data to report on.