AttributeError: 'dict' object has no attribute 'env_specs'

[SachinLearns]

I have setup the environment with requirements.txt.
Was running the given code:
python main.py --env-name InvertedDoublePendulum-v2 --algo vime-ppo --use-gae --log-interval 1 --num-steps 2048 --num-processes 1 --lr 3e-4 --entropy-coef 0 --value-loss-coef 0.5 --ppo-epoch 10 --num-mini-batch 32 --gamma 0.99 --num-env-steps 1000000 --use-linear-lr-decay --no-cuda --log-dir /tmp/doublependulum/vimeppo/vimeppo-0 --seed 0 --use-proper-time-limits --eta 0.01

Error:

Traceback (most recent call last):
File "/vime-pytorch/main.py", line 11, in
from misc import utils
File "/vime-pytorch/misc/utils.py", line 6, in
from envs.envs_util import VecNormalize
File "/vime-pytorch/envs/envs_util.py", line 27, in
import pybullet_envs
File "/anaconda3/envs/vime-py/lib/python3.10/site-packages/pybullet_envs/init.py", line 14, in
register(
File "/anaconda3/envs/vime-py/lib/python3.10/site-packages/pybullet_envs/init.py", line 6, in register
if id in registry.env_specs:
AttributeError: 'dict' object has no attribute 'env_specs'

Any suggestions on how to resolve it?