Can't add products to the Price Modifiers

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.1.3
• Fix Version/s: 7.3, Master
• Component/s: Digital Merchandise Management → Price Lists, Master
• Labels: None
• Severity of Issue: Critical
• Git Pull Request: https://github.com/liferay-frontend/liferay-portal/pull/339

Steps to Reproduce

• Go to Control Panel → Commerce → Pricing.
• Go Price Lists.
• Create a new Price List.
• Go to the Price Modifiers.
• Create a new entry
• Set Target: Product and Modifier: Percentage
• Go into the Product tab and try to add a new product

Expected Result

 The Product is successfully added.

Actual Result

 The Product is not added, this is the console error: