Appearance > Widgets: it is not possible to add new widgets.
In inspector chrome:

Uncaught TypeError: Cannot read property ‘mouse’ of undefined
at load-scripts.php?c=1&load[chunk_0]=hoverIntent,common,hoverintent-js,admin-bar,jquery-ui-draggable,jquery-ui-droppable,admin-widgets,svg-painter,wp-hooks,heartbeat&load[chunk_1]=,wp-auth-check,mce-view,imgareaselect,image-edit,thickbox,quicktags,wplink,jquery-ui-position,jquery-ui-menu,jquery-ui-autocompl&load[chunk_2]=ete,media-upload&ver=5.5:20

If I disable Powerkit the error disappears and everything goes back to working normally

WordPress: 5.5
Theme: Squaretype, latest
Powerkit: 2.3.3

Thanks