I was having an issue with the main PC that we use at home. Over the last couple of months, from time to time, one of us wouldn’t be able to log in. It was the famous infamous Windows 10 black screen. When they logged in, a cursor would appear over a black background and then nothing else.
Sometimes it can be a huge pain in the rear to work with SSL on local IIS or IIS Express in Visual Studio. I was trying to debug an issue with my authentication flow and just could not get my auth server to run locally. I finally came across this StackOverflow answer and discovered that I was running into the issue where my port for IIS Express was something like 66234. I didn’t know that to get it to work right, you have set the port between 44300 and 44398. And like Jason’s answer, absolutely nothing I could see either during setup or runtime told me that.