I tried to develop a small module, just to display welcome message, when i am trying to access that module in admin dashboard it is showing "The requested page could not be found."
my url is llok like this: http://mysite.com/drupal-8.5.4/admin/structure/my_module
this is the path i defined in routing.yml file : /admin/structure/my_module
i cleared the cache also, but not works for me
i am attaching all files and all file with zip also and admin screen shot
can you please guide me what is the problem