Thank you for your explanation. I understood the code does not work by just putting it on the main.js. I am trying to put the TextInput element, referring to the updated documents, into my trial but it does not work. I set a 5000ms time limit by using newTimer, callback, and disable() so that the participants cannot write an answer anymore after 5000ms. The error message is the same as the one in the previous question, “ERROR: There must be some items in the running order!”. The demonstration link is below.
https://farm.pcibex.net/r/FNJolB/