Tema de worpress con los codigos Php

Mi pagina esta presentando los siguientes errores PHP, e revisado todos los Plugins uno a la vez y nada.

Notice: Function is_tax was called incorrectly. Conditional query tags do not work before the query is run. Before then, they always return false. Please see Debugging in WordPress for more information. (This message was added in version 3.1.0.) In /var/www/wp-includes/functions.php on line 5831

Deprecated: Array and string offset access syntax with curly braces is deprecated in /var/www/wp-content/themes/boxseat/framework.php on line 1103

Deprecated: Array and string offset access syntax with curly braces is deprecated in /var/www/wp-content/themes/boxseat/framework.php on line 1103

Deprecated: Array and string offset access syntax with curly braces is deprecated in /var/www/wp-content/themes/boxseat/framework.php on line 1104

Deprecated: Array and string offset access syntax with curly braces is deprecated in /var/www/wp-content/themes/boxseat/framework.php on line 1104

Deprecated: Array and string offset access syntax with curly braces is deprecated in /var/www/wp-content/themes/boxseat/framework.php on line 1105

Deprecated: Array and string offset access syntax with curly braces is deprecated in /var/www/wp-content/themes/boxseat/framework.php on line 1105