Hi @fuvavi,
We are very sorry to hear that your site didn’t work after we released the v1.2.0 which was improving the plugin security. One of the points was to make absolutely sure that nobody that doesn’t have administrator privileges can access the plugin configuration.
This check looks up if the user is an admin and if not it executes wp_die() to exit the plugin configuration. Unfortunately the behaviour on some sites was not as expected. This was fixed in version 1.2.1 after Mike Martin helped us to trace the problem as we couldn’t reproduce it on our test sites.
We are developing these plugins trying to help the community and are very sorry if they cause problems. We are a small team and try to do our best.
Best regards from Spain.