I had been doing a lot of work integrating the HSBC payment module and making it work, but somehow which may or may not be linked, I now can't access the admin payment page (where you select which payment options are enabled). I get the attached error.
It used to work, it even worked as I was implementing the hsbc module as I had to access some options in the hsbc module to configure it. The rest of the admin and shop work fine, and you can even make a transaction, it is just the admin page that won't show properly.
Has anyone any ideas what is broken?



