Aes_256 (and possibly the others) make use of name "out" as port name of the encrypted data bus coming out the verilog module.
The name "out" is a reserved keywork in VHDL so when you put an instance of the verilog core inside a VDHL top you get the below error. near "out": (vcom-1576) expecting IDENTIFIER.
To fix the bug is that easy to rename out to something else like dout. Thanks