Alert 4210:JavaScript Syntax Error in 'Begin JS Routine' tab. See 'Line 24: Invalid left-hand side in assignment' in the 'Begin JS Routine' tab


Dear all,

My program worked well offline, but I encountered this alert when I tried to upload the experiment to Pavlovia, and the pilot experiment stuck on the page “initialising the experiment” when I tried to run it.

The stranger thing is that I found “Allowed Keys” showed error…

Many thanks for your help!