Hi, here’s an update. I deactivated one of the recently installed plugins which is Yuzo Related Posts Pro. And after deactivated it, it’s fixed. Looks like it’s the cause of the issue, the ‘Add Media’ and ‘EasyAzon’ button work as usual after that. Can you please check into it if I want to use both your plugin and Yuzo Related Posts together? I can provide you the plugin to test. Let me know, thanks.