Qlik Sense: Insight Advisor not working with error "Unable to generate Insights"

[Andrew_Delaney]

In particular apps when you attempt to use the insight advisor in Qlik Sense April 2019 and June 2019, you get the following error:
“Unable to generate Insights”.

If you check the Qlik Sense Precedents log you also see errors along the lines of:
esponse https://qlikserver:4950/v1/precedents/generator?appId=bf41337c-9adb-4f9f-82aa-9ecdb0ae6cff&collectionStrategy=collectPublished&xrfkey=8013544b83a442d4  {"message":"Cannot read property 'fieldId' of undefined"} 500

If you check the data profiling logs on the server you see
"message":"Profiling operation could not be completed","details":{"message":"Internal Server Error"}} 500 

Environment:
Qlik Sense Enterprise on Windows, April 2019

Resolution:

Is corrected in Qlik Sense September 2019 release.   Refer to defect ID below in Qlik Sense Sept 2019 Release notes. 

Cause:

This indicates that there are some invalid entries in the precedents database which is preventing the insight advisor from working for this app.

Defect ID:

•  QLIK-95551: