Full Error Message:
“Invalid field ContentLocation for SObject class is invalid and needs recomplication: rsdoc.DocumentManager:line 248, column 24: > Invalid field ContentLocation for SObject ContentVersion”

-This error can happen when trying to install the A5 Documents package from AppExchange and you are unable to install it.

How to resolve: 
-Review your setting configurations in your Salesforce Files > Settings section of Salesforce setup. Make sure the box ‘Enable CRM Content’ is checked.