Fatal error: Uncaught Error: Call to undefined function Symfony\Polyfill\Mbstring\iconv() in /var/www/html/sensetrack/vendor/symfony/polyfill-mbstring/Mbstring.php:1068 Stack trace: #0 /var/www/html/sensetrack/vendor/symfony/polyfill-mbstring/Mbstring.php(160): Symfony\Polyfill\Mbstring\Mbstring::iconv() #1 /var/www/html/sensetrack/vendor/symfony/polyfill-mbstring/bootstrap80.php(15): Symfony\Polyfill\Mbstring\Mbstring::mb_convert_encoding() #2 /var/www/html/sensetrack/vendor/vlucas/phpdotenv/src/Util/Str.php(46): mb_convert_encoding() #3 /var/www/html/sensetrack/vendor/vlucas/phpdotenv/src/Store/File/Reader.php(76): Dotenv\Util\Str::utf8() #4 /var/www/html/sensetrack/vendor/phpoption/phpoption/src/PhpOption/Some.php(108): Dotenv\Store\File\Reader::Dotenv\Store\File\{closure}() #5 /var/www/html/sensetrack/vendor/vlucas/phpdotenv/src/Store/File/Reader.php(75): PhpOption\Some->flatMap() #6 /var/www/html/sensetrack/vendor/vlucas/phpdotenv/src/Store/File/Reader.php(48): Dotenv\Store\File\Reader::readFromFile() #7 /var/www/html/sensetrack/vendor/vlucas/phpdotenv/src/Store/FileStore.php(62): Dotenv\Store\File\Reader::read() #8 /var/www/html/sensetrack/vendor/vlucas/phpdotenv/src/Dotenv.php(222): Dotenv\Store\FileStore->read() #9 /var/www/html/sensetrack/vendor/vlucas/phpdotenv/src/Dotenv.php(237): Dotenv\Dotenv->load() #10 /var/www/html/sensetrack/config.php(9): Dotenv\Dotenv->safeLoad() #11 /var/www/html/sensetrack/index.php(9): require_once('...') #12 {main} thrown in /var/www/html/sensetrack/vendor/symfony/polyfill-mbstring/Mbstring.php on line 1068