Sometimes if you set a link for the maker from Markers > Content and not able to acess it following can be a reason –
If the Tooltip is set to display on click of the marker ( Tooltip > Display on > Click ). A click event will work to display a tooltip box. In this case, if you have set a link for the marker will not work as clicking on the marker will display a tooltip box. Read Unable to Click on Markers when Hotspot Tour Option is Enabled?