Can't load Sefaira in Sketchup 2019 for Mac

I already followed the instruction at but my problem is still unresolved.
I tried the instruction several times, the first two times I got white blank page after I input my user ID and password.
The third time, I couldn’t even reach the login page (only managed to get to the console where I input "window.location = "https… command, then it gave an error message as shown in the attachments.)