Fatal error: Uncaught TypeError: Argument 1 passed to mysql_fetch_array() must be an instance of mysqli_result, boolean given, called in /var/www/vhosts/vordereifel.de/httpdocs/includes/functions/links.php on line 173 and defined in /var/www/vhosts/vordereifel.de/httpdocs/includes/functions/mysqli.php:239
Stack trace:
#0 /var/www/vhosts/vordereifel.de/httpdocs/includes/functions/links.php(173): mysql_fetch_array(false, 1)
#1 /var/www/vhosts/vordereifel.de/httpdocs/includes/functions/links.php(184): isUserRegistered(NULL, NULL, 'Backend')
#2 /var/www/vhosts/vordereifel.de/httpdocs/includes/smarty/templates_c/5baebc7961ea7df4b8529ca2f86966fe14408881_0.file.sitemap.tpl.php(68): isVisibleByArray(Array, false, true)
#3 /var/www/vhosts/vordereifel.de/httpdocs/includes/smarty/lib/sysplugins/smarty_internal_runtime_tplfunction.php(36): smarty_template_function_recursiveSitemap_7467048946011934f593626_89836781(Object(Smarty_Internal_Template), Array)
#4 /var/www/vhosts/vordereifel.de/httpdocs/includes/smarty/templates_c/5baebc7961 in /var/www/vhosts/vordereifel.de/httpdocs/includes/functions/mysqli.php on line 239