Devices typically have several “font-families” pre-installed on them to help interpret symbols in various different styles. Not all font-families include stylized versions of every symbol. When a symbol is supposed to display that the font-family your device is using doesn’t support, you’ll see a “□”.
Our platform should display fine if your device supports any of the following font-families:
Montserrat, "Helvetica Neue", helvetica, arial, sans-serif
It’s also possible that a unicode symbol is supposed to display that your browser doesn’t support. If this is the case, you can simply try a different browser.