Tao toolkit pretained model in deepstream sdk 6.4

while trying to run any pretained model from deepstream tao toolkit, I am getting this error:
Failed to load plugin ‘/usr/lib/x86_64-linux-gnu/gstreamer-1.0/deepstream/libnvdsgst_udp.so’: librivermax.so.1: cannot open shared object file: No such file or directory
GLib (gthread-posix.c): Unexpected error from C library during ‘pthread_setspecific’: Invalid argument. Aborting.
Aborted (core dumped)
I am following these instructions: deepstream_reference_apps/deepstream_app_tao_configs/README.md at master · NVIDIA-AI-IOT/deepstream_reference_apps · GitHub