jsPsych.randomization.shuffleNoRepeats

[mcvc968]

Hi!
I am trying to use the jsPsych.randomization.shuffleNoRepeats plugin to create a random sequence of 12 trials with no repeats. However, I am getting an error ('Second argument to jsPsych.randomization.shuffleNoRepeats() must be a function.') whenever I try to use it as suggested on the JSPsych page. I get the same error when I try adding 'function(a,b) { return a.stimulus === b.stimulus}' as the second argument.

Any help would be greatly appreciated! Thanks in advance!
shufflednorepeats_test.txt