update

wp-content/plugins/youtube-feed-pro/inc/class-install-skin.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace SmashBalloon\YouTubeFeed;
+
+/**
+ * Skin for on-the-fly addon installations.
+ *
+ * @since 1.0.0
+ * @since 1.5.6.1 Extend PluginSilentUpgraderSkin and clean up the class.
+ */
+class SBY_Install_Skin extends PluginSilentUpgraderSkin {
+
+	/**
+	 * Instead of outputting HTML for errors, json_encode the errors and send them
+	 * back to the Ajax script for processing.
+	 *
+	 * @since 1.0.0
+	 *
+	 * @param array $errors Array of errors with the install process.
+	 */
+	public function error( $errors ) {
+
+		if ( ! empty( $errors ) ) {
+			wp_send_json_error( $errors );
+		}
+	}
+}