Same issue. After updating Responsive lightbox & gallery, the plugin doesn’t work anymore. URL fncta-midipy.fr
When logged in, I have this messages :
Warning: implode(): Invalid arguments passed in /datas/vol1/w4a130541/var/www/fncta-midipy.fr/wp-content/plugins/responsive-lightbox/includes/class-folders.php on line 845
Warning: implode(): Invalid arguments passed in /datas/vol1/w4a130541/var/www/fncta-midipy.fr/wp-content/plugins/responsive-lightbox/includes/class-folders.php on line 849
I hope this issue will have promptly a solution