Error during Xcode Component Installation

Question

I just installed a software update that I was prompted for, presumable affecting Xcode. Now when I start Xcode, I am presented with a dialog box which states that Xcode must in

Answer 1

I am a newbie in iOS development

I was facing same problem while trying to install XCode 6.4 on my 2009 mac pro 13inch with macOS yosemite. I do not know why, just after I changed the system time back to 10th October 2019 according to one of the answers in this thread and click on "try again" button, XCode was finally installed and running!

After this, I changed my system time back to current time (chose the automatic date and time option) and everything works good for me.