Hi, Thank you for your reply. The issue that you describe in your answer is not my issue.
My problem is that when the IPGB is enabled, when I click on Settings -> Permalinks then it loads for a long time and it redirects to blank page with the following message:
The page isn’t redirecting properly
Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
This problem can sometimes be caused by disabling or refusing to accept cookies.
There is no Dashboard link.
I use “WP Hide” plugin. Could this plugin make any problem with yours?
I will appreciate your response. Thank you.