Fatal error: Uncaught Error: Call to undefined function Masterminds\HTML5\Parser\mb_decode_numericentity() in /var/www/html/amp/vendor/masterminds/html5/src/HTML5/Parser/CharacterReference.php:47 Stack trace: #0 /var/www/html/amp/vendor/masterminds/html5/src/HTML5/Parser/Tokenizer.php(1157): Masterminds\HTML5\Parser\CharacterReference::lookupDecimal() #1 /var/www/html/amp/vendor/masterminds/html5/src/HTML5/Parser/Tokenizer.php(121): Masterminds\HTML5\Parser\Tokenizer->decodeCharacterReference() #2 /var/www/html/amp/vendor/masterminds/html5/src/HTML5/Parser/Tokenizer.php(82): Masterminds\HTML5\Parser\Tokenizer->consumeData() #3 /var/www/html/amp/vendor/masterminds/html5/src/HTML5.php(161): Masterminds\HTML5\Parser\Tokenizer->parse() #4 /var/www/html/amp/vendor/masterminds/html5/src/HTML5.php(89): Masterminds\HTML5->parse() #5 /var/www/html/amp/vendor/magyarandras/amp-converter/src/Converter.php(147): Masterminds\HTML5->loadHTML() #6 /var/www/html/amp/index.php(60): magyarandras\AMPConverter\Converter->convert() #7 {main} in /var/www/html/amp/vendor/masterminds/html5/src/HTML5/Parser/CharacterReference.php on line 47