Hi suelynnmah, I solved this problem. This problem is caused by network problems, and the URL http://cdn.jsdelivr.net:443 can not be parsed correctly, and cannot be directly accessed in China. So I should access the online experiment by using VPN.
Hi suelynnmah, I solved this problem. This problem is caused by network problems, and the URL http://cdn.jsdelivr.net:443 can not be parsed correctly, and cannot be directly accessed in China. So I should access the online experiment by using VPN.