I created an experiment in the free trail. I still have 21 days left. When I clicked the "start experiment" button I get this message "Sign up for a plan to start your experiment"
I was under the impression that we could actually run experiments during the free trial. Why is this not working?
It sounds like you are on a free trial for Optimizely X but trying to start an experiment in Optimizely Classic. Since your trial only covers Optimizely X, you will be prompted to sign up for a plan if you try to run an experiment in Classic. To take full advantage of your free trial, click the Optimizely X tab in the navigation bar to switch to the X platform and recreate your experiment.