Forms not submitting - missing cors error

Hi there!
Somewhere in the last 6-7 hours this error has arisen – after 14 months of working smoothly.

My form is not submitting on my live environment, but is submitting on my staging environment.

A read only link for my site is here.

Note: reCAPTCHA is not enabled, so that solutions is not the right one.

Upon inspecting the browser developer console, it says that it was an internal server error (http code 500). Further inspection shows the following error:

Access to XMLHttpRequest at '' from origin '' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

A cross-origin resource sharing (CORS) request was blocked because of invalid or missing response headers of the request or the associated preflight request .

To fix this issue, ensure the response to the CORS request and/or the associated preflight request are not missing headers and use valid header values.

I also note that indicates that as of today there have been spam related issues on webflow form submissions, and perhaps webflow has added a filtering measure that is causing submission issues?

Thanks for all help!

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Hey Alpha, welcome to the community.
That does sound suspiciously related, I’d recommend you contact Webflow’s support immediately so they know they’re blocking legitimate form submissions.

Their email may have been turned on again as well while dealing with this.

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Thank you Michael. have already done. They’re looking into it!

UPDATE: this seems to be resolved now.