After a fresh installation and server setup, i see that the TFTP service is not working as expected.
I had to manually copy the files from "C:\Program Files\Theopenem\tftpboot\proxy\efi64\pxelinux.cfg" to
"C:\Program Files\Theopenem\tftpboot\pxelinux.cfg"

@theopenem_admin wow nice.
but I get an error:

Server Error in '/' Application.
Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: The 'targetFramework' attribute in the <compilation> element of the Web.config file is used only to target version 4.0 and later of the .NET Framework (for example, '<compilation targetFramework="4.0">'). The 'targetFramework' attribute currently references a version that is later than the installed version of the .NET Framework. Specify a valid target version of the .NET Framework, or install the required version of the .NET Framework.

Source Error:

Line 8: <forms name="form1" protection="All" timeout="240"/>
Line 9: </authentication>
Line 10: <compilation debug="false" targetFramework="4.8"/>
Line 11: <httpRuntime targetFramework="4.8"/>
Line 12: </system.web>

Source File: C:\Program Files\Theopenem\Toems-UI\web.config Line: 10

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3429.0

@chornbeck @theopenem_admin I have the same issue with current iPXE 1.00 not detecting nic
please provide instruction which iPXE files to replace on the server