Parse error: syntax error, unexpected T_FUNCTION

I’m receiving the following error when trying to activate the latest version of the plugin (3.0.1):

Parse error: syntax error, unexpected T_FUNCTION in /home/capture/public_html/wp-content/plugins/gravity-forms-pdf-extended/pdf.php on line 65

I’m using the latest 1.7.5 version of gravity forms.

https://www.ads-software.com/extend/plugins/gravity-forms-pdf-extended/