Plugin doesn’t save my settings

Hi,

When I try to configure the extra fee I want people to pay when they use the payment method “pay later”, the plugin says it saves my settings but when I check these settings are gone. Also if I check them on the website they are not there.
This happens to all the payment methods by the way.

Can someone help me with this problem? In this way they plugin has no worth for me.

The page I need help with: [log in to see the link]