I'm trying to install a specific font family but everytime I try to install it this shows up (http://image.prntscr.com/image/5aa16057c1434fd8ba169931ec38af2b.png)
This translates to "Font -weird font name?- is already installed. Do you want to replace it?". Instead of showing the actual font name the dot with the weird sign appears. Is there a way to fix this font?

Which font are you trying to install?

Assemblage font family

Are you talking about this font?

https://www.myfonts.com/fonts/latinotype/assemblage/

If that's the case, you need to contact customer service on the website you bought it.