Hi, As per this previous question with similar issue https://wpforo.com/community/how-to-and-troubleshooting-2/visual-editor-color/
My text editor is virtually non readable. I have tried using some custom css with my limited knowledge but to no avail.
In the previous comment you stated issue likely theme or plugin conflict and required the url of the site in order to provide the correct css fix. My site can be viewed at https://www.bisfhouse.com/Community/ask-a-question/bisf-buildings-insurance/#post-2579
I have attached screenshots below as my sharing icons are also not visible.
Many thanks
You have two 4.x.x version of Font-awesome loaded on website. However these are old versions of icon libs. Please enable wpForo Font Awesome 5.0.6 version. Navigate to Dashboard > Forums > Settings > Features admin page. Find the "Enable wpForo Font-Awesome Lib" option and set it "Forum". Save all changes, delete all caches and press Ctrl+F5 twice on forum front.