This website uses DyadStats which filters and deliberately blocks unwanted requests. If you are connecting to this site via a Proxy Server it is possible that you are being blocked inadvertantly and clicking the refresh button on your browser might help to clear the Proxy Server's cache. (Sometimes holding the shift key while refreshing can help).
There are several reasons for blocking some requests: The automatic retrieval - 'harvesting' - of email addresses that are then used by spammers to send unsolicited email. Fake traffic and log-file spamming, where page requests are made with false header information in order to get particular web addresses to appear in online traffic reports. There is a lot of automatic and robotic Internet traffic - some welcome, e.g. from search engines and other content aggregators, and some not so welcome. For more information please visit https://www.dyadstats.co.uk/