Font change in Web App Builder when app moved from ArcGIS Online to web server

[Clarson]

I am trying to figure out why my font, in a Web App Builder project, is changing when I move an app from being hosted in AGO to our in-house web server. I have attached two .jpgs showing the font difference (1) is AGO and (2) is our web server (IIS). The text in question are links generated in the "Attribute" tab of WAB, using the Foldable theme.

(1)

(2)

If anyone could explain what is happening here and how to remedy it, it would be greatly appreciated.

[RobertScheitlin__GISP]

Clement,

  Do you see any errors or warnings in your browsers web console when using the app on your server?

[Clarson]

I think so. Would that be these?

When I hover over any of the errors, it reads :http://url.com/projectname/jimu.js/css/fonts/avenir-next/bb12345...

[RobertScheitlin__GISP · Accepted solution]

Clement,

   You do not have the woff mime type added to your web server.

Set mime types for web fonts in IIS » Coding Still 

[Clarson]

That did the trick. Thank you so much, Robert. That had been bugging me for days.