The April 2018 Windows update (Release 1803) removes the ability for EVP Office (or any other executable) to run if it is hosted on a network share that uses SMB Version 1. SMBv1 has been deprecated by Microsoft since 2014, and removing the ability for applications to run over it is a security feature of the new release of Windows.
EstateVal and the other EVP Office applications will report this situation as:
Log-on failed: Talk_CreateTcpClient() failed: Sock_Handle_OpenClient() failed (-4)
Log-on failed: Talk_CreateTcpClient() failed: Sock_Handle_OpenClient() failed (-4022)
To determine if the Windows 10 client is using SMBv1, run the following command from PowerShell as a user with administrative privledges:
If the share that hosts the EVP Office executables show a "Dialect" of less than "2.0", the server that provides the share will need to be upgraded.