Fatal error: Method XF\Widget\WidgetRenderer::__toString() must not throw an exception, caught Error: Call to undefined function XF\Mvc\iconv() in /home/forum/public_html/src/XF/Template/Templater.php on line 0

Fatal error: Uncaught Error: Call to undefined function Symfony\Polyfill\Mbstring\iconv_substr() in /home/forum/public_html/src/vendor/symfony/polyfill-mbstring/Mbstring.php:568 Stack trace: #0 /home/forum/public_html/src/vendor/symfony/polyfill-mbstring/bootstrap.php(38): Symfony\Polyfill\Mbstring\Mbstring::mb_substr('ErrorException', 0, 75, 'UTF-8') #1 /home/forum/public_html/src/vendor/dokuwiki/utf8/utf8.php(163): mb_substr('ErrorException', 0, 75) #2 /home/forum/public_html/src/XF/Error.php(134): utf8_substr('ErrorException', 0, 75) #3 /home/forum/public_html/src/XF/App.php(1945): XF\Error->logException(Object(ErrorException), true, '') #4 /home/forum/public_html/src/XF.php(189): XF\App->logException(Object(ErrorException), true) #5 [internal function]: XF::handleFatalError() #6 {main} thrown in /home/forum/public_html/src/vendor/symfony/polyfill-mbstring/Mbstring.php on line 568