Hello dFactory,
I still get the same error on RL Gallery 2.3.5 on WP 5.9.3. The JavaScript Console says:
Uncaught Error: cannot call methods on sortable prior to initialization; attempted to call method 'disable'
jQuery 5
observer https://abc/wp-content/plugins/responsive-lightbox/js/admin-galleries.js?ver=2.3.5:689
setTimeout handler*initGalleries/observer</< https://abc/wp-content/plugins/responsive-lightbox/js/admin-galleries.js?ver=2.3.5:687
dr Underscore
observer https://abc/wp-content/plugins/responsive-lightbox/js/admin-galleries.js?ver=2.3.5:681
initGalleries https://abc/wp-content/plugins/responsive-lightbox/js/admin-galleries.js?ver=2.3.5:680
<anonymous> https://abc/wp-content/plugins/responsive-lightbox/js/admin-galleries.js?ver=2.3.5:18