Icons are not appearing correctly in wpForo

Icons are not appearing correctly in wpForo on my company’s website. They show up as rectangles with 4 tiny letters/numbers inside. I am also having a glitch on the same page with my regular website footer – our social media icons are showing up as the same rectangles….but they appear ok on every other page on the website. Does anyone know how to fix this?

I also have trouble getting the “login” and “create an account” buttons to show consistently.