No plugins it compatible with the chosen theme

Hi all,
the theme I have chosen for the construction of this site (www.stanis.it) is SOUNDWAVESSE 2.0.

Beautiful, but I can't insert any plugins that involves the insertion of the shortcode in the post or page. No one. And I can not also insert image galleries or audio players.
Even the normal gallery created with wordpress works. After you refresh the page, what you see is only the shortcode. Nothing more.
Is there a solution to this? Are there plug-ins compatible with this theme?
Yeah, because I would not change the theme at all!
Thank you in advance!
Marilù Massafra...