error while trying to converting .pb to tflite in object detection

URL of the documentation with the issue
https://github.com/tensorflow/models/blob/master/research/seq_flow_lite/export_to_tflite.py

Description of the issue:

i face an error while running the script from the above linked repo, in object detection.

python export_to_tflite.py --help

2021-09-02 14:48:34.746834: W tensorflow/stream_executor/platform/default/dso_loader.cc:64] Could not load dynamic library 'libcudart.so.11.0'; dlerror: libcudart.so.11.0: cannot open shared object file: No such file or directory
2021-09-02 14:48:34.746857: I tensorflow/stream_executor/cuda/cudart_stub.cc:29] Ignore above cudart dlerror if you do not have a GPU set up on your machine.
Traceback (most recent call last):
File "/home/sahasra/jukshio/object_det_rec/TensorFlow/models/research/seq_flow_lite/export_to_tflite.py", line 30, in
from layers import projection_layers # import seq_flow_lite module
File "/home/sahasra/jukshio/object_det_rec/TensorFlow/models/research/seq_flow_lite/layers/projection_layers.py", line 21, in
from tf_ops import sequence_string_projection_op as ssp # import seq_flow_lite module
ImportError: cannot import name 'sequence_string_projection_op' from 'tf_ops' (unknown location)

can someone help me fix this?