I'm using nopCommerce 3.90 with source. I am doing this on a local test system executing the website through Visual Studio 2017.
After importing 1,000 products using the Excel product import, when I go to one of those products on the front end user side using the category search, the products show for that category, but when I click on the product name link, it does not go to the product detail page. It just does nothing.
Bringing up one of the test items, created by nopCommerce install, clicking on it's link works OK.
Does anyone know why the detail pages are not showing for the items that I have imported?
When editing the product in admin, it will certainly "...generate it automatically ...". According to this post https://www.nopcommerce.com/boards/t/44623/import-new-products-with-no-slug.asp, I had tested it back in 3.80 and it worked fine during Import too (although I quickly compared 3.80 to 3.90 code and it looks the same), but someone replied only a couple of weeks ago that it was a problem (in 3.9 I assume).
For now, I recommend that you put the product name in the SeName column in the xlsx file. (Test import of just one record first ;)