Error adding to basket

[FawnFragrancesGB]

I was trying to do a bit of shopping but keep getting an error whenever I try to add to basket. It doesn't matter what shop I try to add something from, I get the same error and nothing goes in the basket. 

I wonder how many other users are experiencing this and how it could be affecting our sales! 

I'm signed in on the buyer app btw

[JJewellerySuppliesUK]

What does the error say?  Maybe update the app.

[FawnFragrancesGB]

It says 'there was an error adding this item to your basket'

I've checked and the app is up ti date