Brought down website

I have previously been a big fan of this plugin. However, today I had a very busy client contact me frantically because their site was down. There was a technical error that prevented any page on the website from loading, and the admin area was inaccessible. Thankfully, the new built-in feature from WordPress alerts us to the problem by email and even provides the error data on the plugin that caused the error. In this case, it was this plugin. Removing the plugin fixes the problem and the site is operating fine again. Here is the error information:

Error Details
=============
An error of type E_ERROR was caused in line 54 of the file /home/copasoaps/public_html/wp-content/plugins/zero-spam/zero-spam.php. Error message: Uncaught LogicException: Function ‘zerospam_autoloader’ not found (function ‘zerospam_autoloader’ not found or invalid function name) in /home/copasoaps/public_html/wp-content/plugins/zero-spam/zero-spam.php:54
Stack trace:
#0 /home/copasoaps/public_html/wp-content/plugins/zero-spam/zero-spam.php(54): spl_autoload_register(‘zerospam_autolo…’)
#1 /home/copasoaps/public_html/wp-settings.php(371): include_once(‘/home/copasoaps…’)
#2 /home/copasoaps/public_html/wp-config.php(92): require_once(‘/home/copasoaps…’)
#3 /home/copasoaps/public_html/wp-load.php(37): require_once(‘/home/copasoaps…’)
#4 /home/copasoaps/public_html/wp-admin/admin-ajax.php(22): require_once(‘/home/copasoaps…’)
#5 {main}
thrown