Users are getting locked out of the server by ModSecurity for cPanel. Checking the log, I find error messages like:
"Cross-site Scripting (XSS) Attack. Matched signature <.cookie>"] [severity "CRITICAL"] [hostname "**redacted**"] [uri "/wp-content/plugins/simple-notices/js/jquery.cookie.js"]
Any chance you can update the plugin so that it does not generate files with the word "cookie" in the file name?