Bootstrap Barrio Subtheme jQuery issue in Drupal 8

I installed Bootstrap Barrio theme as a parent theme / base theme. And follow all the instruction for the sub theme installation here. Theme installed properly but I found some jQuery issue in browser's console. See issue description below:

Uncaught TypeError: Cannot set property 'onclick' of null
at Object.attach (global.js?v=8.5.5:25)
at drupal.js?v=8.5.5:25
at Array.forEach ()
at Object.Drupal.attachBehaviors (drupal.js?v=8.5.5:22)
at drupal.init.js?v=8.5.5:16
at HTMLDocument.t (ready.min.js?v=1.0.8:4)
3drupal.js?v=8.5.5:13 Uncaught TypeError: Cannot set property 'onclick' of null
at Object.attach (global.js?v=8.5.5:25)
at drupal.js?v=8.5.5:25
at Array.forEach ()
at Object.Drupal.attachBehaviors (drupal.js?v=8.5.5:22)
at Drupal.AjaxCommands.insert (ajax.js?v=8.5.5:522)
at ajax.js?v=8.5.5:413
at Array.forEach ()
at Drupal.Ajax.success (ajax.js?v=8.5.5:411)
at HTMLScriptElement.bigPipeProcessPlaceholderReplacement (big_pipe.js?v=8.5.5:26)
at Function.each (jquery.min.js?v=3.2.1:2)