'Sequential' object has no attribute 'append'

[Golbstein]

When building the model using basicsr
I get the following error:

File "/usr/local/lib/python3.9/dist-packages/torch/nn/modules/module.py", line 1177, in getattr
raise AttributeError("'{}' object has no attribute '{}'".format(
AttributeError: 'Sequential' object has no attribute 'append'

I tried to infer the model -

CUDA_VISIBLE_DEVICES=0 python test.py -opt ./options/test/OSRT_light_x2_fisheye_aug.yml