Try another browser. If you are using Chrome, try using Firefox or Safari. If you are using Firefox, try using Chrome or Safari. If you are using Safari, try using Chrome or Firefox.
Check to see if your browser is up to date.
If you are using a VPN, try disabling it. If you are using a proxy, try disabling it.
Clear your browser cache and cookies
Open the menu

Go to Delete Browsing Data

Check the boxes for Cookies and Cached Data, then click Clear Data

This should clear out any old data that might be causing issues.