Attachment popup window is mangled

Hi cspply,

This is a CSS conflict with your theme or other plugins. 

Please register a new user, that will have permission to attach files, and send (PM or to support[at]gvectors.com email address) login details to allow us to check it and provide CSS solution for you. 

Thank you @cspply,

Put the following CSS code in Dashboard > Forums > Settings > Styles > "Custom CSS Code" textarea, delete all caches and check again. 

[class*="fa-"]{
   font-size: 12px !important; 
}
#wpfa_dialog .wpfa-button * {
   color: #FFF !important;
}
#wpfa_dialog .wpfa-button *{
   color: #FFF !important;
   font-size: 12px !important;
   border-radius: 0;
}
[class*="wpfa-"] {
   width: auto;
}
#wpfa_dialog .wpfa-button {
   background-color: #649E2D;
   border-color: #447714;
}
#wpfa_dialog .wpfa-button.wpfa-button-add-to-post {
   background-color: #FF812D;
   border-color: #F47222;
}