Unexpected token < in JSON at position 0 ,loading error

Is there anything that can be changed on server setting side or application side to accomodated 660 questions ?
because this error “Loading Error ,Unexpected token < in JSON at position 0” is being caused by many questions, because when i splitled the form in two different form the error dissapered? or thereis an number of question we should not exceed in one form? if so what is the maximum limit

@adminpro, is this an issue in your self hosted server?

no i use kobotoolbox server.

Seems like it is the same issue we had in our other post:

Actually the problem is not the long list of choices, the problem is having many questions, in one form. i have 630 questions to be answered.

@adminpro, FYI kindly please be informed that you see this issue with two different scenarios:

  1. When you have a long list of questions
    or,
  2. When you have a long list of choices

So maybe 630 questions in your case should be a long list of questions.

Yes you are correct, this error happen because i have a long list of questions.