I have the same problem and am not able to resolve it. I set up the category and product but I get page not found. Se it here http://http://184.108.40.206/sailing-trips and click on Ivan's Cro Sailing 2019. Help is greatly appreciated.
Yeah, I know that. I meant what should I do, to get the same thing on my test environment. Because as you can check on our demo, http://demo.grandnode.com I'm able to create reservation product, then assign it to category and view it from category page. That's why I'm asking.
I found the issue, which was not an issue actually. If you are using the Available start/end date fields in your GrandNode store and you are able to see the products on category pages, please remember to disable the "Ignore "filtering start and end date available products" (sitewide)". We are highly focused on GrandNode performance, mentioned fields are mostly unused by users, so we decided to ignore them by default, to improve the category pages performance out of the box in bigger stores.
You set the availability start date in the future. So you don't want to show that product. That's why you receive this error. Field "Available start date" is used to set the first day when the product should appear on your store.