Google sites showing question mark

when I open safari and go to a google site, it shows a strange character with a question mark with a box.

It looks like this

This is the google account site and I can't read it at all.

some other google sites like google mail is readable, but it still contains the same character and

I can't read some contents.

However, when I try and open the same site with google chrome app, it works fine.

I also Restarted my Mac and it still doesn't work.

Please Help.