Poster problem with PHOTO GALLERY SUPSYSTIC

Hello,

Excuse me for my English, I am French. I installed the pro version of PHOTO GALLERY SUPSYSTIC on my site on this page: http://atelierdcopatine.com/la-boutique/
Nothing is displayed !
I also installed “PHP Compatibility checker” and it detects a php 7.0 error. Here is the report :

FILE: /home/atelierdpe/www/wp-content/plugins/supsystic-gallery-pro/src/GridGalleryPro/Galleries/Controller.php
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FOUND 1 ERROR AFFECTING 1 LINE
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175 | ERROR | PHP 7. Found: ‘0x0’ in PHP 7. Found: ‘0x0’
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FILE: /home/atelierdpe/www/wp-content/plugins/supsystic-gallery-pro/src/GridGalleryPro/Flickr/Model/phpFlickr.php
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FOUND 0 ERRORS AND 2 WARNINGS AFFECTING 2 LINES
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62 | WARNING | Use of deprecated PHP4 is not supported since PHP 7.
1901 | WARNING | Use of deprecated PHP4 is not supported since PHP 7.
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Is this a php error or something else? Thank you for helping me because I bought the pro version and I wish it worked correctly.

Thank you very much.