The Service option you selected is no longer available'. - ILR visa application form

Hi All,

In my ILR visa application online form when i enter the 'Pay' tab, the page is always showing as 'The Service option you selected is no longer available'. (Message displays inside a red box)

I haven't select any options still it is showing like that. Also it shows an option to choose for the services. Can anyone tell me why it's showing like that in my application? Can i select the Super Priority service and continue?

Shall i ignore the popup message which is always shows on my application?