If you generate a sitemap but notice that the crawler Size is still 1 or 2, you can try the following steps to debug the issue.

1. Verify that the sitemap URL works.
2. Verify that the URLs within the sitemap are available for public visit.
   1. If the URLs are only private, that can cause a sitemap generation issue.
3. Verify /wp-content/plugins/litespeed-cache/var/crawlermap*.data exists.
   1. If it doesn't exist, there may be a permission issue with one of the directories in the path.
4. Verify that the environment home_url is identical to the home URL in Step 2. Keep in mind that http://example.com/test.html and https://example.com/test.html are different!
   1. Fix by changing LiteSpeed Cache > Settings > General > Site Address (URL) to match the value in the sitemap.