There are components of IE (Internet Explorer) in that window. If you have restrictions on IE (some do), the 'Activate' but may fail to respond to clicks. The options are:
Set Internet Options to its default settings
Do a search for ‘Internet Options'
Security → Medium → Apply →
Use the command line to activate
Click here to see command line activation directions
Note: The latter will not work for the trial - only for the paid version of the product.