First, this is a known issue because these older files are not properly signed yet.
Next, and more importantly, why are you trying to use an eval that is 5 years old? There have literally been 12 versions of ConfigMgr released since this one.
This is what you should be using: https://www.microsoft.com/en-us/evalcenter/evaluate-microsoft-endpoint-configuration-manager
Also, on a semantic note, there is no such thing as ConfigMgr (aka SCCM) 2016. Although ConfigMgr was part of the System Center 2016 suite, it never followed that versioning convention. The product is simply known as Configuration Manager and the latest version in 2103.