Error in Cells #6

[tempaccountforissue]

I keep getting these errors

`error Traceback (most recent call last)
Cell In[6], line 16
14 plt.figure(figsize=(20, 4))
15 plt.axis("off")
---> 16 plt.imshow(cv2.cvtColor(img, cv2.COLOR_BGR2RGB))
17 plt.show()

error: OpenCV(4.6.0) C:\b\abs_74oeeuevib\croots\recipe\opencv-suite_1664548340488\work\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'`

from this section of code

`#@title export the results
import matplotlib.pyplot as plt
import importlib
import PIL
importlib.reload(PIL.TiffTags)
import cv2
import os

frames = []
for i in range(0, n_iter, 100):
img = cv2.imread(os.path.join(output_dir, f"iter_{i}.jpg"))
frames.append(img)
plt.figure(figsize=(20, 4))
plt.axis("off")
plt.imshow(cv2.cvtColor(img, cv2.COLOR_BGR2RGB))
plt.show()`