I don't know what is wrong. But this is not the first time I am having this issue, each time I try to access his website, it appears a white screen and just loading. It ends up loading the page, but it takes a long time. Sometimes it takes a minute, and sometimes more than that. I often try using VPN and switch between internet connection to access his website and nothing helps me most of the times. So, I believe it could be from his hosting server which slow down speed for my region. I don't know, probably he knows better than us.
What is your region? Most of the time the website loads very fast here.
https://beta.ninjastic.space/users specifically has no internal calls, so the loading is blazing fast (< 200 ms). Try it and if it's taking a lot of time for you, then it's most likely an issue on your internet provider or network config.