diff --git a/includes/tutor-general-functions.php b/includes/tutor-general-functions.php
index 6bd20ef199..159f80e61a 100644
--- a/includes/tutor-general-functions.php
+++ b/includes/tutor-general-functions.php
@@ -1241,6 +1241,16 @@ function tutor_getallheaders() {
 			}
 		}
 
+		if ( ! isset( $headers['Authorization'] ) ) {
+			foreach ( $headers as $name => $value ) {
+				if ( strtolower( $name ) === 'authorization' ) {
+					unset( $headers[$name] );
+					$headers['Authorization'] = $value;
+					break;
+				}
+			}
+		}
+
 		return $headers;
 	}
 }
diff --git a/includes/tutor-template-functions.php b/includes/tutor-template-functions.php
index a15ccf4f76..251cc9ce91 100644
--- a/includes/tutor-template-functions.php
+++ b/includes/tutor-template-functions.php
@@ -545,14 +545,23 @@ function get_tutor_course_thumbnail( $size = 'post-thumbnail', $url = false ) {
 		$placeholder_url   = tutor()->url . 'assets/images/placeholder.svg';
 		$thumb_url         = $post_thumbnail_id ? wp_get_attachment_image_url( $post_thumbnail_id, $size ) : $placeholder_url;
 		$thumb_url         = apply_filters( 'tutor_course_thumb_url', $thumb_url, $post_id, $size, $post_thumbnail_id );
+		$alt_text = '';
 
 		if ( $url ) {
 			return $thumb_url;
 		}
 
+		if ( $post_thumbnail_id ) {
+			$alt_text = get_post_meta( $post_thumbnail_id, '_wp_attachment_image_alt', true );
+	}
+
+		if ( empty( $alt_text ) ) {
+			$alt_text = get_the_title( $post_id );
+		}
+		
 		echo '<div class="tutor-course-thumbnail">
-            <img src="' . esc_url( $thumb_url ) . '" />
-        </div>';
+		<img src="' . esc_url( $thumb_url ) . '" alt="' . esc_attr( $alt_text ) . '" />
+	</div>';
 	}
 }
 
diff --git a/restapi/RestAuth.php b/restapi/RestAuth.php
index c6030c723b..a8b7de3bd0 100644
--- a/restapi/RestAuth.php
+++ b/restapi/RestAuth.php
@@ -303,7 +303,7 @@ public static function validate_api_key_secret( $api_key, $api_secret, $return_r
 	 * @return boolean
 	 */
 	public static function process_api_request() {
-		$headers = apache_request_headers();
+		$headers = tutor_getallheaders();
 
 		if ( isset( $headers['Authorization'] ) ) {
 			$authorization_header = $headers['Authorization'];