How to Fix 404 in Product Edit Page and view product page:

Hello, We are using Dokan and we tried to create a product from a vendor account.The product is successfully created but there have 3 problems
1. We can’t edit product – > (showing 404 page )
2. We can’t view the product by the view button from the dashboard – > (showing 404 page)
3. We shaw the product is showing on the store once we click to view this product it’s – > (shows 404 page)

We changed permalinks many times
Common Settings -> Post name
Product permalinks -> Custom (/product/)