Live App is blank white screen?

My supervisor and I were testing around with emails upon form submission and upon saving all of our apps have crashed and are now just blank white screens.

We’re both completely lost as what happened as we did not do anything other than change an email address. Any one have any ideas?

It seems to be back up now?

Did your CSS get messed up too?

Edit: Nevermind, I see what happened. The “modern design” stuff got turned on. It’s frustrating that they would do whatever they did to turn that on by default.

Hello! I have the same issue. Where do I turn off the modern design?

Go to settings->header & page menu → use legacy design setting. Switch use legacy design settings on (I believe this might be what you are looking for)

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There is also a section to restore the button styles to the legacy setting