@InciteJoe it looks to me like that button module isn't from the boilerplate (at least the version I'm using) as the boilerplate outputs an anchor tag with a hs-button class rather than a button tag as yours does.
Can you post the content of the html area in your button module? It'll give me a clue to what the url field is called
Sorry about that @BarryGrennan I am using the free Hubspot "Session theme" and I didn't realise that it has a modified button module
It looks like it has a field group called "button_options" then a field within this called with a field called "button_link_toggle" with is a Boolean and then it just has the field called "button_link" which is a link field
Hi, @InciteJoe, thanks for the question! One question for context, are you getting an error when trying your current approach? I am hoping we can help give the community more details to work with.