tune.Tuner RunConfig Error

AttributeError: ‘DataFrame’ object has no attribute ‘RunConfig’

I am receiving this error when i include RunConfig in my code block for tuner. Basically my code block for tuner is as follows:

tuner = tune.Tuner(
trainable,

tune_config = tune.TuneConfig( …),
param_space = { parameterss},
run_config = train.RunConfig(stop = stopping_criteria, checkpoint_score_attr = ‘episode_reward_mean’)
)
results = tuner.fit()