If the QuerySystemError is seen when opening the CFO Overview, or any other Power BI dashboard, it’s probably because the Entity Store refresh isn’t working correctly.
To resolve this, navigate to >> System administration > Setup > Entity Store and make sure “Automatic refresh enabled” is switched to Yes. This will schedule a new “Full reset” batch job.
It’s also worth checking that the “Full reset” batch job is executing correctly by looking through the execution history.
What are you working on? 
Thank you, this is really helpful and got me unstuck setting up a brand new environment!
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