Has link with a URL referencing a local or UNC file path issue means that the URL contains at least one outgoing anchor link with a URL referencing a local or UNC file path.
Why is this important?
A local path is the path to a folder or file on your local computer (e.g. C:\Program Files\Sitechecker). A UNC path is the path to a folder or file on a network and contains the server name in the path (e.g. \\server03\sitechecker\path).
In both cases, the file location is very unlikely to be publicly available to most users, and so having public links to such files will probably result in a poor user experience. Typically, these paths are accidentally referencing local resources.
Our recommendation is to remove all references to such files.
How to fix?
To resolve this issue, identify the anchors which reference a local or UNC file path in the href attribute, and correct each one on a case-by-case basis – which may require reviewing the code that generates the links.
Detect pages having link with a URL referencing a local or UNC file path on your website and go ahead to analyse the other issues on it!
Check not only the issue but make a full audit to find out and fix your technical SEO.