Hi @thkim
Did you check if your bit file is at /home/taeho/.vta_cache/pynq/0_0_1/1x16_i8w8a32_15_15_18_17.bit"?
In my case, I copy the bit file to the above dir.
I also use sudo to run tracker
pushd apps/vta_rpc
sudo -E ./start_rpc_server_to_tracker.sh
popd