URL of experiment: http://pavlovia.org/ps2/envelopes Description of the problem: I created the skeleton of a new experiment in the Builder, and received the titular error when trying to run it online for the first time. There is nothing fancy in the experiment—text, polygons, and mouse responses o…

"prevButtonState is undefined" error

wakecarter July 14, 2020, 3:20pm 2

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