Client Area Navigation and Sidebar do not display titles

Symptom

The primary navigation bar and sidebar menu items do not display correctly. Instead, shortened versions of the text display without capitalization or correct spacing:

Shopping Cart

Cause

The contents of the language file in the /lang directory, which should contain the text for these menu items, is missing, unreadable, or corrupted.

Solution

To resolve this issue:

  1. Connect to the server that hosts your WHMCS installation.
  2. Rename the /lang directory to /lang_backup.
  3. Upload a new copy of the entire directory. You can download this from https://download.whmcs.com or get it from your WHMCS license reseller.