I'm not facing any issue to access Bitsler from my side. I just logged in to my Bitsler account without any problem. You guys should try with their mirror link 'Bitsler.gg' if you are still facing problem with the main domain 'Bitsler.com. You may also try it by clearing your browser cache.
Thank you very much for informing me that the site is performing well and also thank you very much for providing the mirror link. I have checked and logged into the site by the mirror link and it is working fine. I forgot to contact them on telegram as well as made a delayed posting on here. If I could do that earlier then I could place a bet on the FIFA world cup (England vs Iran match).