Why do I keep getting this error when trying to run the model download/load cell?

[dacixn]

NameError                                 Traceback (most recent call last)
[<ipython-input-3-ef4650da9ee5>](https://localhost:8080/#) in <cell line: 148>()
    186 
    187 elif Model_Version=="V2.1-512px" or Model_Version=="V2.1-768px":
--> 188   model=V2()
    189 
    190 else:

[<ipython-input-3-ef4650da9ee5>](https://localhost:8080/#) in V2()
     66 def V2():
     67 
---> 68     if not os.path.exists('/content/gdrive/'+mainpth+'/sd/stable-diffusion-'+blasphemy+'/models/Stable-diffusion/model.ckpt'):
     69       get_ipython().run_line_magic('cd', '/content/')
     70       clear_output()

NameError: name 'os' is not defined

[TheLastBen]

Run the previous cells