Downloaded your plugin this morning, using a widget on pages here, and other similar:
You can see it at the bottom of the sidebar.
Each time I attempt to sign up using the widget, nothing is added in YMLP mailing list. Also tried it with comments, and no new subs are added.
I am pretty sure I have configured it correctly, plugged in all the right settings, tried it both with and without the YMLP API settings, but still no luck. I would appreciate it if you can check over my settings and make sure all is working, or if theres some bug I am unaware of. I will supply all relevant details and access, if needed, once you respond to this message. Thanks in advance:)