Image Show GK4 Working Issue

[Memotas]

I'm using Image Show GK4 v1.55 with Joomla 3.7.4. Image Show GK4 not appearing any theme.

My sliding images are not displaying and it seems it's loading indefinitely.

Please check.

Error logs show:

PHP Deprecated: Non-static method GKIS_gk_bikestore_Model::getData() should not be called statically in /home/----/public_html/-----/modules/mod_image_show_gk4/styles/gk_bikestore/controller.php on line 88