Unable to login after activating this plugin

Hi, I installed this plugin and then activated. After this moment, I am not able to log into the admin dashboard anymore. I also tried with different accounts but the problem persists. It gives an error “You do not have sufficient permissions to access this page.”

https://wordpress.org/plugins/display-sql-stats/