Several ARIA errors
Run a Lighthouse accessibility report and a WAVE accessibility evaluation for details on the errors. These errors are from https://kenwheeler.github.io/slick/
• [aria-] attributes do not match their roles • Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children. • [aria-] attributes do not have valid values • [aria-hidden="true"] elements contain focusable descendents • ARIA input fields do not have accessible names • ARIA toggle fields do not have accessible names
All of these seem to relate to the dot navigation.
Where arrow navigation is used, WAVE flags "Broken ARIA reference" errors.
Errors Broken ARIA reference What It Means An aria-labelledby or aria-describedby reference exists, but the target for the reference does not exist. Why It Matters ARIA labels and descriptions will not be presented if the element referenced does not exist in the page. How to Fix It Ensure the element referenced in the aria-labelledby or aria-describedby attribute value is present within the page and presents a proper label or description.
Source: kenwheeler/slick