Could you please share exact version of some dependency packages

[gitAugust]

Hello，

I have installed dependency packages required in requirement.txt, but code can't run well under my environment.

when I run the example safe_swimmer_run.py, I meet the errorOperatorNotAllowedInGraphError: iterating over tf.Tensor is not allowed: AutoGraph did convert this function. This might indicate you are trying to use an unsupported feature. I guess that may be caused by wrong version of some packages.

my version of some main package is
tensorflow 2.4.1
gpflow 2.1.4
gym 0.18.0
mujoco-py 1.50.1.0
numpy 1.19.2

and my python is 3.7

thanks in advance!