Fatal error: Uncaught TypeError: Argument 1 passed to WP_Translation_Controller::set_locale() must be of the type string, null given, called in /home/roju7201/public_html/wp-includes/l10n.php on line 803 and defined in /home/roju7201/public_html/wp-includes/l10n/class-wp-translation-controller.php:87 Stack trace: #0 /home/roju7201/public_html/wp-includes/l10n.php(803): WP_Translation_Controller->set_locale(NULL) #1 /home/roju7201/public_html/wp-content/plugins/optinmonster/optin-monster-wp-api.php(189): load_textdomain('optin-monster-a...', '/home/roju7201/...') #2 /home/roju7201/public_html/wp-includes/class-wp-hook.php(324): OMAPI->load_plugin_textdomain('') #3 /home/roju7201/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(Object(MonsterInsights_Lite), Array) #4 /home/roju7201/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #5 /home/roju7201/public_html/wp-settings.php(559): do_action('plugins_loaded') #6 /home/roju7201/public_html/wp-config.php(166): require_once('/home/roju720 in /home/roju7201/public_html/wp-includes/l10n/class-wp-translation-controller.php on line 87

Fatal error: Uncaught TypeError: Argument 1 passed to WP_Translation_Controller::set_locale() must be of the type string, null given, called in /home/roju7201/public_html/wp-includes/l10n.php on line 803 and defined in /home/roju7201/public_html/wp-includes/l10n/class-wp-translation-controller.php:87 Stack trace: #0 /home/roju7201/public_html/wp-includes/l10n.php(803): WP_Translation_Controller->set_locale(NULL) #1 /home/roju7201/public_html/wp-includes/l10n.php(959): load_textdomain('default', '/home/roju7201/...', NULL) #2 /home/roju7201/public_html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain() #3 [internal function]: WP_Fatal_Error_Handler->handle() #4 {main} thrown in /home/roju7201/public_html/wp-includes/l10n/class-wp-translation-controller.php on line 87