Attribute error (no attributed CacherNode) when trying to run DistributedDQN

[SaundersJE97]

When trying to run 'agent_distributed_test.py' an attribute error is raised:

raise AttributeError(f'module {self._parent!r} has no attribute {name!r}') AttributeError: module <module 'launchpad' from '/home/jack/anaconda3/envs/acmeBLE/lib/python3.8/site-packages/launchpad/__init__.py'> has no attribute 'CacherNode'

The following libraries are installed: dm-acme 0.4.1 dm-control 1.0.7 dm-env 1.5 dm-haiku 0.0.8 dm-launchpad 0.5.2 dm-reverb 0.7.2 dm-sonnet 2.0.0 dm-tree 0.1.7 tensorflow 2.8.0

From investigating, the CacherNode was removed in this commit.