Load main plugin libraries on plugins_loaded.

Loading immediately when the main plugin file is loaded can cause
race conditions when loading internal libraries conditionally on
other plugins, such as webwork-problem-embed.

openlab-modules.php

@@ -31,4 +31,9 @@ function () {
 	}
 );
 
-App::init();
+add_action(
+	'plugins_loaded',
+	function () {
+		App::init();
+	}
+);