@ArjunR65 You'll need to download the full version of VS2015 Update 3 from Microsoft as they have removed the key they were using previously. Our support team has this available via an FTP link, however that does expire, so posting it here wouldn't be appropriate. The easiest options are;
Install Visual Studio 2015 Update 3 from Microsoft manually before attempting the Studio installation or...
Open a support case and download the offline installer provided by the support staff.
Posted: 2 years ago
Posted: 1 Sep 2021 17:12 EDT
Arjun Rachakonda (ArjunR65)