SLidein plugin "Close" button does not work


I just installed the slide-in plug in and configured with the following settings:
- display after 2 seconds
- display for 5 seconds
- home page only
- slide in from the bottom
- white theme

When the message slides in, I am unable to close it by clicking on the "close" button. The page simply scrolls up and the message stays for 5 seconds.

On the other note, is it possible to hide the message and leave the tab visible so users can open it again if they wish?

The URL is

Thank you