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Beth WalterBeth Walter 

This page has an error. You might just need to refresh it. First, would you give us some details? (We're reporting this as error ID: 467755781)

Whenever I try to go to the Reports in Salesforce Lightning, I get the following error. It has worked fine up until the last couple of days.

This page has an error. You might just need to refresh it. First, would you give us some details? (We're reporting this as error ID: 467755781)

When you click technical stuff, it shows the below: 

Uncaught Error in $A.getCallback() [Cannot read property 'MultiBlockService' of undefined]
Callback failed: serviceComponent://ui.analytics.reporting.runpage.ReportPageController/ACTION$runReport
throws at https://aaon.lightning.force.com/auraFW/javascript/E2OJpiob8DqmgDSgi4K91g/aura_prod.js:35:15. Caused by: Error in $A.getCallback() [Cannot read property 'MultiBlockService' of undefined]
Callback failed: serviceComponent://ui.analytics.reporting.runpage.ReportPageController/ACTION$runReport
Object.runReportCallback()@https://aaon.lightning.force.com/components/reports/reportPage.js:26:329
Satish InugantiSatish Inuganti
Hi Beth,

It looks like you have property "MultiBlockService" which is coming as Undefined/Un assigned and you are trying to use it's value in your component js file . Try to put a undefined check before using it.