This plugin is wrong packed. Tree folder: exit-overlay.zip -> exit-overlay -> exit-overlay
You must unpack and pack .zip last level folder
After install plugin, I find 3 bugs in site inspector
Change name file close.png to Close.png in folder plugins/exit-overlay/images/
Change code $ to jQuery in file plugins/exit-overlay/create-Exit-overlay-box.php line 338 and 349
Hello
Sorry for my english:)
I had same problem. I downgrade plugin to 1.24 version and working fine. Download 1.24 version, extract files and change file /wp-content/plugins/display-widgets/display-widgets.php
