There might be a few reasons that you are unable to access Kissanime official websites. One is that if you are using Adblocker, the administrators at Kissanime might have detected it and have started to deliberately ban such IPs. So, once you have been banned from the website you wouldn’t even be able to see any splash screen or any message that you have been banned from the website.
Another reason is that since Kissanime content has already some legal speculations going on regarding content ownership, many countries and areas have started blocking the website in respective regions. You may be able to get access to Kissanime websites by using mirror/proxy websites.