Unable to verify Facebook Internet Account on macOS

Hello,

I'm running macOS High Sierra on a Mac Mini and I am having trouble verifying my Facebook Internet Account.

I have added Facebook in System Properties -> Internet Accounts and entered my Facebook username email address but I get the error message "Unable to verify account name or password" in the password entry dialog box.

I have verified that my password is correct by logging into the Facebook website and I do not have two-factor authentication enabled there.

I have tried deleting the account and re-adding it. I have also tried deleting ~/Library/Keychains/{UUID} and rebooting the computer but nothing has worked.

Thanks, AB