ML Warning A4028
Must read and agree to the Data Collection Policy before using /errorReport:send
Before you can use /errorReport:send to send information about an internal error in ml.exe or ml64.exe, you must agree to the Microsoft policy on data collection.
The text of the A4028 diagnostic refers you to a website where you can agree to the Microsoft policy on data collection.
For more information about error reporting, see /errorReport (Report Internal Compiler Errors).