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Cross Origin Resource Sharing (CORS) is a feature that is disabled by default in most browsers to present cross site scripting attacks. In our case, as we are working locally, we need to enable it (disable the security policy that prevents it) in order to connect to SAS on a different domain.

OS Browser Launch Command
Mac Chrome open -n -a Google\ Chrome --args --disable-web-security --user-data-dir=/tmp/chrome
Linux Chrome google-chrome --disable-web-security --user-data-dir="/tmp/chrome"
Windows Chrome "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --disable-web-security --disable-gpu --user-data-dir=C:\Temp

It does not seem to be possible to enable CORS in modern Firefox browsers.

You will know if you are successful if you see a You are using an unsupported command-line flag: --disable-web-security. Stability and security will suffer. message.