Ah yes, sorry!
I actually no longer work at SinglePlatform so I’ve been juggling work with responding.
FYI – As far as I know the other two contributors to the code base are still ‘SP’ employees.
So that’s the most up to date WordPress but as I suspected it’s an older version of PHP (5.3 was released in 2009)
Version Release date Supported until
5.3 30 June 2009 14 August 2014
It’s honestly hard to say what’s causing the issue without looking through and debugging your code base.
Very odd because it’s complaining about very basic syntax.
I assume you see this when trying to access the admin page and/or portal?
Maybe the best thing to do is to (locally if possible) test if this happens with other plugins either disabled or uninstalled.
Often in WordPress there can be buggy interactions between different plugins.
Hopefully you can get this figured out.
(Oh also if possible you could try and replicate this error locally with an upgraded version of PHP.)
-Chris