Form fields have multiple labels
If you have cut and pasted existing form elements on the page in Webflow you might get this error.
Check Form elements do not have associated labels to learn how to build accessible forms in Webflow.
Google Lighthouse says
To be announced properly by assistive technologies, both native HTML controls and custom ARIA controls must have accessible names that convey their purpose. elements are a common way to assign names to native controls. If you unintentionally associate multiple labels with a single control, you'll create inconsistent behavior across browsers and assistive technologies: some will read the first label, some will read the last label, and others will read both labels.