I have set up a https binding and I get an error now at least. I checked the installed .net core files and it seems they are okay. (I have uninstalled/instelled them again without any issue.)
First of all, thank you for all your help. I don't have any luck with nopCommerce 4.3 on Windows 2016 Server. I my sadness, I just set up a PC with Windows 10 and the necessary things and I installed nopCommerce 4.3 on it without any problem. The settings are the same like on the server. The server doesn't happy with something. (I don't have time to figure it out.)
Anyway the purpose of this installation is, I want to do an experiment with multiple nop 4.3 in subfolders. The point of this, we want to target the audience country specific offers, logos, (might be design) and let alone the price. We want fixed prices.
Re your server error - there should have been something in the stdout log or the windows events logs I am running Windows 2016 no problems
Re: subfolders - you cannot use multiple installations in subfolders of another website It is a limitation of .netcore You just use different stores - each store can have different themes, languages, products, etc most elements can be individualised on a store basis all using the one database See https://docs.nopcommerce.com/en/getting-started/advanced-configuration/multi-store.html
If the Hosting Bundle is installed before IIS, the bundle installation must be repaired. Run the Hosting Bundle installer again after installing IIS.
If the Hosting Bundle is installed after installing the 64-bit (x64) version of .NET Core, SDKs might appear to be missing (No .NET Core SDKs were detected). To resolve the problem, see Troubleshoot and debug ASP.NET Core projects.
I installed everything on a Windows 10 PC. And it is working fine. This is just a test purpose. Doesn't matter where it is at the moment. It will be challenge again, if we have to put on our live server. That one is also Windows 2016 Server.
I think I have figured out the subfolder question. I am using ngrok to share my local webserver on the internet. You can try this link https://1ad2a6153c87.ngrok.io/ The pictures are missing. You can make the logo visible if you delete the "http://nop43.com/" and just leave the
. (in browser developer tools - F12) You cannot use the flags to change website, I think it is kind of issue like the pictures. You can change between sites if you change the URL from https://1ad2a6153c87.ngrok.io/en/ to https://1ad2a6153c87.ngrok.io/hu/ This is a separated nopCommerce website with separated database. You can check if you make the logo visible again.
In local circumstances I can change the website by the flag nicely.
If you are interested in how I solved it, I am happy to explain.