CNSP_decoding _tutorial error in line 63

[Brianna-Liu]

Hi, dear engineers
While i am runing this tutorial script, this error in line63 keeps showing out, and I don't know how to fix it even though i have tried my best. I have checked data variables, my eegData are 30 channels EEG data (sampled at 1024Hz),epochs are extracted from 0-1000ms as my stim data are 1000ms long speech(downsampled at 250Hz)., but still can't fix this problem, please help.