mbj-webdevelopment on "[Plugin: PayPal Donation Buttons] Activation Error"

I'm really hoping the following error can be resolved as this plugins appears to do everything we need!

Upon activating the plugin, I receive this error:

Parse error: syntax error, unexpected T_STRING, expecting T_CONSTANT_ENCAPSED_STRING or '(' in /home1/linncou2/public_html/draft/wp-content/plugins/donation-button/includes/class-donation-button-constant-contact-helper.php on line 12

I also deactivated all plugins (there were not that many) to confirm there wasn't a conflict.

Is it possible for you to help? Thanks a million!

https://wordpress.org/plugins/donation-button/