I have downloaded Ext JS 6.5.3 evaluation package and using it to evaluate migration in my project.
I tried migrating from Ext JS 4.2 to the latest version Ext JS 6.5.3. Due to nature of my existing project, currently I cannot use Sencha Cmd to build my application. I'm using a traditional way of including the required JS and CSS files in my project and running the application. I have successfully migrated all my codebase but getting the below exceptions with the TreeMenu implementation.
I have created a Sencha Fiddle to reproduce the issue https://fiddle.sencha.com/#view/editor&fiddle/2iac
I tried debugging further into extjs-debug.js, but couldn't get any clue about these exceptions. Exception that I'm getting
