You are trading on a Fixed Spread Demo account.
If you opens a chart for the regular floating pairs which are greyed out in the market watch, then the one click trading and trading options will not be available because it is not tradable.
You should right click on the .fix pair in the market watch and select ‘Chart Window’ and then these options will be available.
It’s not a fault of the platform, it’s just that the floating major pair options are not tradable on fixed spread demo.
I hope this helps.