diff --git a/includes/Classifai/Providers/Azure/TextToSpeech.php b/includes/Classifai/Providers/Azure/TextToSpeech.php
index bd612f81f..b426dfafc 100644
--- a/includes/Classifai/Providers/Azure/TextToSpeech.php
+++ b/includes/Classifai/Providers/Azure/TextToSpeech.php
@@ -188,7 +188,7 @@ public function setup_fields_sections() {
 				'label_for'      => 'post_types',
 				'option_index'   => 'post_types',
 				'options'        => $this->get_post_types_select_options(),
-				'default_values' => $default_settings['post-types'],
+				'default_values' => $default_settings['post_types'],
 			]
 		);
 
@@ -238,6 +238,9 @@ public function sanitize_settings( $settings ) {
 
 				if ( ! empty( $current_settings['voices'] ) ) {
 					$current_settings['authenticated'] = true;
+				} else {
+					$current_settings['voices'] = [];
+					$current_settings['authenticated'] = false;
 				}
 			}
 		} else {
@@ -434,7 +437,7 @@ public function get_default_settings() {
 			'voices'        => array(),
 			'voice'         => '',
 			'authenticated' => false,
-			'post-types'    => array(),
+			'post_types'    => array(),
 		];
 	}
 
diff --git a/src/js/gutenberg-plugin.js b/src/js/gutenberg-plugin.js
index be2eb044c..698457181 100644
--- a/src/js/gutenberg-plugin.js
+++ b/src/js/gutenberg-plugin.js
@@ -217,7 +217,8 @@ const ClassifAITTS = () => {
 	// Post type label.
 	const postTypeLabel = useSelect(
 		( select ) =>
-			select( 'core/editor' ).getPostTypeLabel() ||
+			( typeof select( 'core/editor' ).getPostTypeLabel !== 'undefined' &&
+				select( 'core/editor' ).getPostTypeLabel() ) ||
 			__( 'Post', 'classifai' )
 	);