The "Request URL" shows the URL of the request sent to the server when it was crawled.
The "URL" on the left side displays the URL in the address field of the browser.
The reason why "Request URL" is blank is that the page (URL) is accessed, but the URL is not displayed.
In this case, the request is not actually sent to the server.
(Excluding URLs that AeyeScan has determined to be exempt from being Crawl).
For example, a case where there is a change on the display, but no request is sent.
This includes the display of menus and modal windows.