Plugin configuration window is not opening in mautic

Hello Mautic Community,

I am using mautic 3.3.3 version . I am creating plugin with callback functionality . When i click the plugin widget , plugin configuration window is not opening in server side. But I tested the whole plugin in local, its working fine . I checked the error log in server side.

Error log : mautic_sample_public_index route doesnot exist.
But we defined route in config file.

Anything else I should be checking? Any suggestions? I need support for plugin to solve this issue

Thanks for the help