Strange GPT4 error on desktop

I am having this strange error when using GPT4 in Chrome desktop browser.
Chrome console reports these errors:

" Access to fetch at ‘…’ from origin ‘…’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. If an opaque response serves your needs, set the request’s mode to ‘no-cors’ to fetch the resource with CORS disabled. "

“POST … 403 (Forbidden)”

Same user account works in Chrome on mobile terminal.
Also works on desktop in Edge.
Started yesterday almost 24 hours ago.
Tried logout/login.
I did no changes into Chrome settings prior this strange behavior.

Any idea about the reasons ?!