After study, Microsoft’s patches for July do have an impact on TSplus compatibility on Windows 10 (32 and 64 bits) and on Windows Server 2019 (32 and 64 bits).
The Microsoft update causing the issue is KB4559003.
We work to provide a silent patch for this incompatibility, in the meantime please disinstall the Microsoft Update and reboot the TSplus server.
To keep your TSplus installation always up to date it is necessary to subscribe a mantainance subscription. The subscription starts from the date of activation and can be made or renewed for one, two or three years.