Fix the canonical link on the homepage on WordPress
Why it matters
The canonical address on the homepage is not valid, for example relative, malformed or pointing at a page that does not work. Search engines then ignore it and guess which version to index.
The fix
- Look at which plugin prints the canonical (your SEO plugin, a theme, or a cache or multilingual plugin). Fix the setting there, such as the homepage canonical field or the site address under Settings, General, and make sure only one source prints it.
Related
Scan your domain to see whether this applies to you.