Fix addons

inc/class-license.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace WP_Ultimo;
+
+class License {
+	use \WP_Ultimo\Traits\Singleton;
+
+	/**
+	 * This exists to maintain compatibility with Addons
+	 *
+	 * @return null
+	 */
+	public function get_license_key()
+	{
+		return null;
+	}
+}