KeyError: 'FastRCNN is not in the model registry. Please check whether the value of FastRCNN is correct or it was registered as expected. More details can be found a

[CyanMystery]

config:
model = dict(
type='FastRCNN',
scope='mmdet',
init_cfg=dict(type='Pretrained', checkpoint=url),
backbone=dict(
type='mmaction.ResNet3dSlowFast',