I've never had issues in the past connecting to my Oanda demo account via Zorro, however, when I've been trying to connect recently I am getting an error.

In order to try with some clean settings, I created a new sub-account, re-generated the API token, and then used these details in the User ID / Password Boxes. I have selected Demo as the account type, and am using the Oanda V20 option in the dropdown.

Still no luck, and getting the attached message, which would indicate something wrong on the Oanda side (due to ! at the start of the message) - is anyone else getting this from them too?

I had been testing with 2.35 however just to rule out that this was causing the issue I've reverted back to 2.30 however no change.