Multiple sample form isn't posting to your sample spreadsheet.
I suspect Google changed something in their urls and your form query is being sent to a destination that has moved.
I also noticed that when I click "eye" icon in Google Forms for form preview, it gives url ending in "/viewform" instead of "/formResponse?", not sure if it's related to issue, but thought it was worth mentioning.
m4k04
commented
8 years ago
Multiple sample form isn't posting to your sample spreadsheet.
I suspect Google changed something in their urls and your form query is being sent to a destination that has moved.
I also noticed that when I click "eye" icon in Google Forms for form preview, it gives url ending in "/viewform" instead of "/formResponse?", not sure if it's related to issue, but thought it was worth mentioning.