When create subscription with only 1 rate plan level dicount charge, the error message is hard to understand
Issue: Create a product with one rate plan and one recurring charge with charge model of discount fixed amount. Set DiscountLevel = RatePlan.and then, create the subscription to pick the product and rate plan. There is an error message pop up as "There is no charge can be apply with the discount charge." This error message is hard to understand
Defect number: DE10064
Proposed solution: Should make the error more comprehensible and figure out a way to avoid this kind of senario.