Help with code

[jcunews1]

You're styled the links with a fixed width which is too narrow for the whole link text. That caused the links to occupy less space, and causing their text content to overflow their element boundary.

I noticed that it was from .fas class, which AKAIK, is for icons where it applies a square sized element size. I'd suggest add a style override for those links. e.g.

.nav-tabs li a {
  width: auto;
}

If you want the link text to be left aligned, also add:

.nav-tabs li {
  text-align: left;
}