Can't get attribute 'Accumulator' on module 'pytorch_lightning.trainer.supporters'

[sun-peach]

My version is 1.3.0.dev0 (I pip install from the master branch of git). However, when I run model.load_from_checkpoint(ckpt_path), it failed and shows the problem.

When I run on another PC, everything is good. Does anyone encounter this issue?

Thank you.

[ananthsub]

Could you post the full stack trace you're seeing?