Correct 'Error 722' when loading an existing experience
Following a Microsoft update released in early January 2018 for Windows 7 devices, you may encounter Error 722 when loading an existing experience into Composer, as shown in the error snapshot below.
The underlying cause is a bug in the Microsoft .NET Framework as described in the following announcement: .NET Framework January 2018 Rollup Known Issue KB4074906. Microsoft quickly removed the faulty update so there are few chances that new users will be impacted by this issue.
If you are affected by this issue, please apply Solution 1 - Run Fixit tool for KB4074906 described in this Microsoft article.