A PHP Error was encountered

Severity: 8192

Message: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated

Filename: website/book_visit.php

Line Number: 58

Backtrace:

File: /home/u484344999/domains/kbe-gcc.com/public_html/application/views/website/book_visit.php
Line: 58
Function: htmlspecialchars

File: /home/u484344999/domains/kbe-gcc.com/public_html/application/controllers/Web.php
Line: 414
Function: view

File: /home/u484344999/domains/kbe-gcc.com/public_html/index.php
Line: 296
Function: require_once