The CSS code worked perfectly. Thanks so much for your help - much appreciated!

Please try the following CSS code:

#wpforo #wpforo-wrap .fa, .fas {
   font-weight: 900 !important;
}

The CSS code should be added in the Dashboard > Forums > Settings > Styles admin page "Custom CSS Code" textarea.

In any case please don't forget to delete all caches and press CTRL+F5(twice) on the frontend before checking.

I've already excluded my forum pages from Autoptimize. However, I still do not see the icons on the forum. I've tried refreshing and clearing all caches from the forum.

Thanks for the quick response. 

Yes, I do have a cache plugin installed: Autoptimize

Do you happen to have a guide on how to exclude the forum pages from this cache plugin? Would be very helpful to guide me through the process. 

Here is the URL to my forum: www.learn-asp.com/inner-circle/

Appreciate your assistance with this. 

Thank you.

Please let us know do you have a cache plugin installed? If yes please exclude the wpForo Forum page from your cache plugin and check again. Almost all cache plugins should have an option to exclude pages from the caching process. 

More info here: https://wpforo.com/community/faq/wpforo-and-cache-plugins/

Also please leave the example URL.

I've come to notice that the icons on my forum page are no longer visible anymore - I'm not too sure what caused this. I've read through other troubleshooting guides on this forum; I've tried going to forum > settings > enabling icons for WPForo; I've also tried clearing my cache. However, the icons are still not visible.

What's odd is that some of the icons are visible whilst others are not. I've attached a screenshot for your reference. 

Please help me with this. 

Thanks so much.