Stuck on loading

Hi, when I run drawit it gets stuck on the loading screen. It throws this error:

Uncaught TypeError: Cannot read property ‘offsetTop’ of null
at Object.e.stickyButton (admin_uncode.min.js?ver=1.0.0:1)
at HTMLDocument.<anonymous> (admin_uncode.min.js?ver=1.0.0:1)
at i (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,moxiejs,plupload,plupload-handlers,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-dr&load[]=aggable,jquery-ui-droppable,jquery-ui-sortable,jquery-touch-punch,quicktags&ver=4.9.8:2)
at Object.fireWith [as resolveWith] (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,moxiejs,plupload,plupload-handlers,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-dr&load[]=aggable,jquery-ui-droppable,jquery-ui-sortable,jquery-touch-punch,quicktags&ver=4.9.8:2)
at Function.ready (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,moxiejs,plupload,plupload-handlers,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-dr&load[]=aggable,jquery-ui-droppable,jquery-ui-sortable,jquery-touch-punch,quicktags&ver=4.9.8:2)
at HTMLDocument.K (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,moxiejs,plupload,plupload-handlers,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-dr&load[]=aggable,jquery-ui-droppable,jquery-ui-sortable,jquery-touch-punch,quicktags&ver=4.9.8:2)

Any idea what’s happening?