I confirm that this error occurs on my side, but the extension works well.
I am surprised why no one has reported this problem, as it appears as soon as you choose any currency other than USD.
because I try to open my bookmark with IDR and there is nothing problem with my side before. And, I had checked today and any currency has been resolved Maybe someone has reported this problem.
Do you use a VPN?
I used VPN before, and the problem also appears after disabling it. It seems a problem with my country I guess, I don't in another device, but when I check on another explorer like Blockchain, com, I get the same problem even use or without VPN.
I don't clear cache and cookies atm.