Error message

• Warning: iconv(): Wrong encoding, conversion from "HTML-ENTITIES" to "UTF-8" is not allowed in Twig\Extension\CoreExtension::convertEncoding() (line 1197 of /code/vendor/twig/twig/src/Extension/CoreExtension.php).
• Warning: iconv(): Wrong encoding, conversion from "HTML-ENTITIES" to "UTF-8" is not allowed in Twig\Extension\CoreExtension::convertEncoding() (line 1197 of /code/vendor/twig/twig/src/Extension/CoreExtension.php).