The "Page indexed without content" error in Google Search Console indicates that Google has indexed your page but found little to no visible content. This issue can arise from improper configurations or technical problems. To fix it, first, check the page's content to ensure it's not blocked by a robots.txt file. Next, verify that your site isn't using JavaScript to load content invisibly. Also, review your server responses and fix any issues causing low content visibility. Lastly, resubmit the page for indexing to update Google.
For more details, read the blog at :
https://www.algosaga.com/blog/page-indexed-without-content/