Unhandled Exception

Message:

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

Location:

/var/www/yappe.ch/app/system/errorhandler.php on line 32

Stack Trace:

#0 [internal function]: Errorhandler::native()
#1 /var/www/yappe.ch/app/system/func.php(26): htmlentities()
#2 /var/www/yappe.ch/app/views/business_detail.php(46): e()
#3 /var/www/yappe.ch/app/system/view.php(72): include('...')
#4 /var/www/yappe.ch/app/system/app.php(17): View->publish()
#5 /var/www/yappe.ch/index.php(18): App::run()
#6 {main}