3818526 - Error: "We're Sorry We encountered a problem whereby we could not fulfil your request. An internal error has occurred and this request cannot be validated. Please report this to your administrator" when trying to book hotel - Tripsource

When user is trying to book a hotel (Tripsource), has the error "We're Sorry
We encountered a problem whereby we could not fulfil your request
An internal error has occurred and this request cannot be validated. Please report this to your administrator"

Error when user tries to book hotel, in the last step of the booking , KBA , CON-CA-CMP-MCF , Manage Custom Fields , CON-MOB-TRV-HTL , Hotel , CON-CA-USP , User Profile , Problem