The following software must be installed on the web server:
· Windows 2012 R2 or 2016
· Microsoft .NET Framework 4.5.2
· Microsoft IIS 8.x (configured and active)
· DotNetNuke (DNN) 9.0.1
· SQL Server 2012 or 2016 SP1
The new changes as of 7.4.1 are NOT backward compatible.