I am trying to deploy an XLS form and open it for testing and data collection but I keep getting the error “Unexpected token < in JSON at position 0”. Peculiarly, I deployed this form, without error, then changed a label name and now I only see this error. I have deployed the form many times to no avail and have checked for critical errors and there are none.
I have tried to use the “ODK - XLSForm Online v2.x” to test the form and the only critical error that appears is the use of “begin_kobomatrix” which has always worked in the past for me, regardless of this error, and has supporting documentation for use in XLS forms.
This error seems to go away, after some time, but it does so arbitrarily. I would appreciate any insight into why my form can’t be opened and why it seems to work and not work arbitrarily. Additionally, when I try to open the survey on Safari as opposed to Chrome I get a “String does not match the expected pattern” instead of the aforementioned “Unexpected token” error.