Firstly, I'm brand new to XD so bare with me.
When i link two art boards together and preview they transition fine but when I upload to my hosting site the links don't work.
Vertika Gupta commented
I am hoping you are generating the share for review link, As in share for review we can see the transition and share for development is use to see information about the artboard we cannot see the transaction in share for development. If you are generating the design in share for review , please can you upload the Link and update us on which browser you are facing this issue.