error 500 since last update

Hi,

My website throws an error 500 since I’ve updated to the latest version of your plugin. I double checked that the issue comes from your plugin and not another one (though the error 500 might exist because of a conflict between your plugin and another one).
I have secupress installed and updated to their latest version which saw some major changes (maybe some security issues causing conflict?).
Any idea what could cause an issue with your latest release?

Thanks

Florian