SQL Reporting Services - T2Embed.dll missing
SQL Server Reporting Services specifically is not supported on Windows Server Core 2008 R2 SP1 and higher.

You've probably stumbled upon one of the reasons why it's not supported. (I.e., it flat out doesn't work.)

Besides hacking around, which may or may not actually fix the issue, I think your only recourse is to install SSRS on a full version of Windows Server, and try again.