Preconditions:

• Added attribute Color
• Added product type based on attribute with selected an option 'Used for product variants' for Color attribute
• Added product

Steps to reproduce:

1. Log in to back office.
2. Go to Product catalog / Products / Product (from preconditions).
3. Switch to 'Variants' tab.
4. Click on 'Generate variants' button.
5. On 'Generate variants' form fill in attribute Color with values 'red' ' blue'
6. Generate product variants.
7. Verify displayed notification popup.

Actual result:
See attached screenshots.

Color attribute is treated as an integer, cannot generate product variants.

Expected result:

User is able to generate product variants based on attribute 'Color'.