images gallery tab doesn't work

Hello,
i've have just installed your extension but setting up the module I can't select any images in gallery tab. I try to select some folder but no images are shown, and so if I try to upload them.

Furthermore on front-end slider is not working and appears this error message:

Notice: Undefined variable: get_link in /web/htdocs/............................../modules/mod_jux_background_slider/mod_jux_background_slider.php on line 188 Warning: shuffle() expects parameter 1 to be array, null given in /web/htdocs/....................................../modules/mod_jux_background_slider/mod_jux_background_slider.php on line 190

What can I do?
Thanks!

HI Valentina,
Thank you for using our product.
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I will check it for you.