How to add a working hyperlink onto Microsoft Powerpoint using a Mac?

Hello,

I am in the midst of writing an assignment and part of that assignment requires me to add a creative poster (using Microsoft powerpoint). I was told to add hyperlinks onto my poster but for some reason, my powerpoint does not let me do this… 

I am able to copy and paste https://www.historicenvironment.scot/visit-a-place/places/skara-brae/ onto the powerpoint but unlike what I just did here, if you click on the one in the powerpoint, it does not bring you to the website. 

I have also tried to type text, highlight it with curser, go to insert, select hyperlink from the drop down menu, insert the url into the box. But when I do this, even though the colour of the text changed, it still won’t bring me to the original website. The URL itself works fine when I paste it onto safari. 

Does anyone know how to solve this issue?

Thanks