Can't sign in

Can't sign in

Hi,

I can't sing in to my account using macOS app, whenever I click on Sign in, a white blank page appears forever and nothing shows up.

Noticing that I'm able to sing in from the browser.

I tried to Contact Support from Help tab, but when I tried to submit the request, "Sending feedback" keeps showing up forever and nothing happens.

My setup:
MacBookPro15,2, Version 10.14.6  (Build 18 G95)
Notebook 4.2.7

I can send you the User Log if needed.