Remote Desktop Gateway Pluggable Authentication and Authorization Sample register DLL not working

[CharlPels]

Hello,

Did follow the sample on a Windows 2019 RDP gateway server.
However it seems that the solution is not working anymore, endup with error.

On a Windows 2019 server with RDP gateway and visual studio 2012 + 2019 installed and where I did the compilation.
The module "RDGAuthenticationPlugin.dll" was loaded but the entry-point DllRegisterServer was not found.
Make shure that "RDGAuthenticationPlugin.dll" is valid DLL or OCX file and then try again.

On a Windows 2019 server fully up to date with Windows RDP gateway role.

The module "RDGAuthenticationPlugin.dll" failed to load

Make sure the binary is stored at the specified path or debug it to check for problems with the binary or dependent .DLL files.
The specified module not be found

Hope somebody can help to get the sample working.