UPK Error when Accessing OLS - Tracking error

UPK Error when Accessing OLS - Tracking error

*Current Gen of Browsers dropped Support for XHR.
Chrome version 80 and earlier is compatible. 

Browser is not Allowing synchronous XHR requests to enable follow instructions below

The commands are:

brave://flags
chrome://flags
edge://flags
search for XHR 
Switch the Allows synchronous XHR requests in page dismissal flag to ENABLED
*Browser relaunch required