QA Heatmap cannot be enabled because you do not have write permission for the file. Please refer to following URL
Please check if you are getting the above error. If you get this error, it is possible that the server does not have permission to write to the directory.
To deal with this, please grant write permission to the wp-content directory by the web server, and change FS_METHOD to direct or ftpext in wp-config.php. For more information about FS_METHOD, please refer to this article and other useful articles. After granting the permissions, please re-enable it.