An uncaught Exception was encountered

Type: Error

Message: Call to undefined function Mpdf\mb_internal_encoding()

Filename: /var/www/html/api.ahn.org/application/third_party/mpdf-7.1.0/src/Mpdf.php

Line Number: 1099

Backtrace:

File: /var/www/html/api.ahn.org/application/libraries/M_pdf.php
Line: 246
Function: __construct

File: /var/www/html/api.ahn.org/application/models/Pdf_model.php
Line: 73
Function: library

File: /var/www/html/api.ahn.org/application/controllers/Pdf.php
Line: 38
Function: profile

File: /var/www/html/api.ahn.org/index.php
Line: 329
Function: require_once