Fatal Error: Fontfile not found or not readable
If you see this error when accessing User Registration, My Account, or a CiviCRM Profile in create or edit mode, then you need to either "turn off" the CAPTCHA setting for the profile...Administer CiviCRM >> CiviCRM Profiles >> Settings
Uncheck ... Include CAPTCHA?
Review and correct the CAPTCHA settings in civicrm.settings.php using the inline documentation in that file:
Note that the referenced font file MUST be a true-type font (generally filename extension will be .ttf).