

<br />
<b>Fatal error</b>:  Uncaught Error: Undefined constant &quot;Patchwork\Utf8\MB_OVERLOAD_STRING&quot; in /home1/ruoclass/public_html/R_class/vendor/patchwork/utf8/src/Patchwork/Utf8/Bootup.php:45
Stack trace:
#0 /home1/ruoclass/public_html/R_class/includes/utf/utf_tools.php(28): Patchwork\Utf8\Bootup::initMbstring()
#1 /home1/ruoclass/public_html/R_class/common.php(97): require('/home1/ruoclass...')
#2 /home1/ruoclass/public_html/R_class/index.php(29): include('/home1/ruoclass...')
#3 {main}
  thrown in <b>/home1/ruoclass/public_html/R_class/vendor/patchwork/utf8/src/Patchwork/Utf8/Bootup.php</b> on line <b>45</b><br />