Hi Abhijit,
Did you check whether you have assigned user roles to these module roles?
It maybe because of that, I think you misses assigning the user roles to these module roles.
Hope this resolves your issue,
Thank you!
Usually this happens because you have a UseRole selected for this page. (Visible For in properties)
Now give only those roles who you want to access this page.
Also make sure you identify the Entities you are using in your page. To those entities you assign the correct module role and those module roles should have the correct access (Read/Write)
That way your errors will go away