Can’t see more posts than 20

Hi, I have more than 20 posts, I have 22. But I can see only 20 in the plugin. I know there is a bar, where I can change the post range, but new posts doesn’t appear.

I see this in the console:

load-scripts.php?c=1&load[chunk_0]=jquery-core,utils&ver=5.5.1:2 Uncaught Error: cannot call methods on sortable prior to initialization; attempted to call method 'destroy'
    at Function.error (load-scripts.php?c=1&load[chunk_0]=jquery-core,utils&ver=5.5.1:2)
    at HTMLDivElement.<anonymous> (widget.min.js?ver=1.11.4:11)
    at Function.each (load-scripts.php?c=1&load[chunk_0]=jquery-core,utils&ver=5.5.1:2)
    at n.fn.init.each (load-scripts.php?c=1&load[chunk_0]=jquery-core,utils&ver=5.5.1:2)
    at n.fn.init.h.fn.<computed> [as sortable] (widget.min.js?ver=1.11.4:11)
    at updateSortableList (reorder-post-within-categories-admin.js?ver=2.7.6:67)
    at Object.success (reorder-post-within-categories-admin.js?ver=2.7.6:98)
    at i (load-scripts.php?c=1&load[chunk_0]=jquery-core,utils&ver=5.5.1:2)
    at Object.fireWith [as resolveWith] (load-scripts.php?c=1&load[chunk_0]=jquery-core,utils&ver=5.5.1:2)
    at x (load-scripts.php?c=1&load[chunk_0]=jquery-core,utils&ver=5.5.1:4)

The page I need help with: [log in to see the link]