I’m sorry, I didn’t capture the error (or I did, but got rebooted and had not saved the capture) but after I updated to 1.3.3 from 1.3, the slider started reporting a security error.
I am running WP 4.3.1 and I know your plug-in doesn’t indicate compatibility with that version, but I wanted to let you know about the error.
I’ve moved back to 1.3 and everything is working again.
I do like the plug-in, so overall, great work.