How to setup mt5-xxl server with a checkpoint?

I am trying to run this notebook related to co referencing( ).

Under requirements heading it says:
Please start a mt5 sever with the checkpoint Coref-mT5-XXL model.
For instance, via rpc-calls send and get results. Not included in this colab.

The checkpoint is stored in google cloud storage:

I tried downloading the checkpoint to colab and use transformers to access it but gives me this error: OSError: Error no file named pytorch model.bin, tf model.h5, model,ckpt. index or flax_model.msgpack found In directory /content/v2/checkpoint_1140000

Can someone help me set up this model along with its checkpoint?