Loading error

When previewing my form, I got the error pasted below. Please help and should i expect this to happen a lot?

Error occured during the loading of this form. It is recommended not to use this form for data entry until this is resolved.

Please contact support@kobotoolbox.org with the link to this page and the error message below:

  • Unexpected token < in JSON at position 0

@Bertha, what is the total number of variables (questions) in your survey project?