I was using WP SpeedUp WordPress plugin to speedup my website but when i tried to visit the settings page of the plugin, iv’e gotten the message that i don’t have permissions to access this page.
When i contacted to the developer of the plugin and informed him about the issue, he told me that he had tested the plugin many times its working. He asked me to check am i login with my administrator user. He also informed me that he has fixed the issue and asked me to try the latest version.
I apologies him that i didn’t remember getting his first reply. The issue was resolved. I thanked him for the quick response.