The "Referring Page" URL means that is where Googlebots got the first indication of your website, according to the last time it was indexed.
See this Google Webmasters Community (Search Console Help) answer: https://support.google.com/webmasters/thread/42053769?hl=en&msgid=42801750
Once you made the necessary fixes on your website, especially the sitemap, WordPress Address (URL) and Site Address (URL) (if WordPress), then have Search Console re-index your website, by going to "URL Inspection > request indexing" (text link).
Once re-indexed, use URL inspection tool to see any more errors it finds.
Backlinks (External Websites Linking to you)
If you dislike that link referral from another website and want that removed, you need to contact the admin for that website to delete that link. Otherwise that backlink can help for your SEO, if it is a reputable website.