Problema al abrir modulo de email

Tengo un problema al intentar abrir la pestaña de emails

y me aparecen los siguientes errores:

Notice: Trying to access array offset on value of type bool in C:\xampp\htdocs\public\legacy\include\ListView\ListViewDisplay.php on line 239

Notice: Trying to access array offset on value of type bool in C:\xampp\htdocs\public\legacy\include\ListView\ListViewSmarty.php on line 288

Notice: Trying to access array offset on value of type bool in C:\xampp\htdocs\public\legacy\include\ListView\ListViewSmarty.php on line 289

Notice: Trying to access array offset on value of type bool in C:\xampp\htdocs\public\legacy\include\ListView\ListViewSmarty.php on line 305

Warning: count(): Parameter must be an array or an object that implements Countable in C:\xampp\htdocs\public\legacy\cache\smarty\templates_c%%4D^4D4^4D409BF2%%ListViewGeneric.tpl.php on line 45

Alguna sugerencia para solucionarlo?

Hola, en que versión de PHP lo tienes ? si es linux; aplicaste los permisos a las carpetas ?