In this post, you’ll learn more about the Error TPM_20_E_SESSION_HANDLES – 0x80280905 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
TPM_20_E_SESSION_HANDLES – 0x80280905
Win32 COM Error Error Description
TPM 2.0: Out of session handles – a session must be flushed before a new session may be created.