Preview Failed - when open app from url in edti mode
I have strange error, when I create experiment I go to editor, than there'a appear a empty view (without any device screen). I share preview on my email, and when I open this url I have an error "Preview Failed" with subtitle "Preview Failed. (null)"
This is very annoying problem for me.
Check that your Optimizely snippet has been implemented on to that page, and I would discourage running these two experiments at the same time. Also check what your experiment will look like when shown to the visitor using forced parameters: