Verify that the sling.servlet.paths property is configured to allow access at this path. AEM sometimes restricts access to paths under /bin in the author instance due to security. You may need to: Go to UserAdmin in AEM (localhost:4502/useradmin).Check permissions for the path /bin/accessibility-iss...

In Sling, if you access a servlet that has been mapped to a path, it will only respond if there is no other resource at that path. If there's a resource with the same path, the servlet won't be invoked. Check the CRXDE Lite (http://localhost:4502/crx/de) to ensure there isn't an existing resource at...

I doubt the console.log will provide much information, i'd rather check the AEM error logs as this  is less likely to be a frontend client side issue.