Can't connect to Akeeba Backup

[drdingens]

Hey

I am trying to connect Panopticon with Akkeba Backup for Wordpress. I got a message that it isn't linked (I connected Panaopticon before I installed Akeeba Backup Professional) and I should press the button to link again.

When I press the button I get the message attached to this. Backup itself works fine. 

All this happens on two different domains.

The Joomla connections I use work fine.

Thanks for any help

Rolf
Zugang verweigert (500 Internal Server Error).pdf