I added a same problem two days before, where my dashboard cannot be accessed by admins. I can login but not being redirected to dashboard.Whereas I can access plugin page directly through direct link(http://penpencilreview.ga/wp-admin/plugins.php)
I cannot access (http://penpencilreview.ga/wp-admin/index.php)
Don’t know if it is the problem of server.
I am trying to rename the plugins to find if those cause the problem
Help will be appreciated