In V5, "Next" cannot be clicked when importing products. What should I do?

1. First confirm if it displays "Data processing not complete: comparing products already in the system". Before the comparison is complete, "Next" will be disabled and may temporarily show 0 items available for import. 2. Wait for the comparison to complete, then check the counts for categories like importable, with errors and already exist; after completion, "Next" will be available for clicking. 3. To view products with duplicate product numbers, you can filter by "Product Number Already Exists" and confirm the handling method for each row, such as "Supplement Photos Only" or "Skip".