K2 update fails when attempting to read connection string from Configuration.config

Topic

K2 update fails when attempting to update existing K2 environment to a newer version. In the InstallerTrace logs, an error was logged when Setup Manager was attempting to read the connection string from C:\Program Files\K2\Setup\Configuration.config:

There is no Unicode byte order mark. Cannot switch to Unicode

Instructions 

1. Go to C:\Program Files\K2\Setup\
2. Open Configuration.config with a text editor
3. Look at the first line:
   
   <?xml version="1.0" encoding="utf-16"?> 
   
   
4. If the encoding is showing "utf-16", try changing the encoding to "utf-8 or remove that line:
   
   <?xml version="1.0" encoding="utf-8"?> 
   
   
5. Save the changes
6. Perform the update again