Mix and Match custom styles-An illegal choice has been detected. Please contact the site administrator.

I too cannot make any changes to the Mix and Match settings without receiving the error An illegal choice has been detected. Please contact the site administrator.

The Mix and Match profile is not letting any changes occur under Appearance/Settings for OpenChurch Mix and Match 7.x-1.10-alpha3 (default theme). Each attempt to change the colors, uncheck Site name, etc. results in a "An illegal choice has been detected. Please contact the site administrator." This is significant as I'd like to change the logo and other aspects of the theme.

I will take a look

OK there is a quick workaround while I fix the issue.

I shouldn't have responsive layout check bc there hasn't been any sort of testing with a responsive layout. You can select 'no' for a responsive layout.

At /admin/appearance/settings/openchurch_mm under tablet you need to select a layout for both 'Sidebar layout' options otherwise you will get an error. Once you do that you can proceed. In the mean time I will look for a code fix for this.

Thank You! That seems to be working.

Fixed this I believe in dev

Yes that is by design, it was easier to do it that way.

Pushed to 7.x-1.10-alpha5