Trial License Key activation error: "Error occurred while contacting server. Error code 400." or "Error code 0" (4296204)

Trial License Key activation error:

"Error occurred while contacting server. Error code 400"

or

"Error occurred while contacting server. Error code 0"

CAUSE 1: The Site Message was not being entered or left as blank.

CAUSE 2: The license number is incorrect or invalid

RESOLUTION 1: Ensure that you enter the 'Site Message' as well, which should be 'Trial Version'.

RESOLUTION 2: Ensure the license number has been input correctly. If it is correct, then the license may be invalid. Please contact your Quest Account Manager or Sales@Quest.com to request that a new license be generated.