Base64 Shortlinks

Looks like a fantastic plugin. I am trying to use it in a wodpress multi network, which may be the problem

Plugin could not be activated because it triggered a fatal error.
Parse error: syntax error, unexpected $end in /var/www/html/wp-content/plugins/base64-shortlinks/base64-shortlinks.php on line 488

https://www.ads-software.com/extend/plugins/base64-shortlinks/