Google Docs Can Not Copy The Text Through Error message

While I working with google docs I like to copy the document so I go to the edit>>copy
then I got the following error message.

Your browser does not allow access to your computer's clipboard.
Instead, please use Ctrl-C for Copy, Ctrl-X for Cut and
Ctrl-V for Paste, or use your browser's Edit menu.

same time while I right-click I have only one option link.
I don’t have the any option like cut,copy and paste.
I try lot of forum and site , they suggest me to clear the cookies then try, I try
but it does not work, Then I try in my laptop it is working perfectly.
There is no issue.

Related post