I made an exe to read images including gifs using pyinstaller. However, the exe can't read gif and the below error occurs. I have installed the latest version of imageio and the program works in interpreter. Could you advise? Thanks in advance. The line raising error: cv_gif = imageio.mimread(pic_path) Error: Traceback (most recent call last): File "Image Viewer.py", line 3085, in <module> File "Image Viewer.py", line 522, in go File "Image Viewer.py", line 1264, in ShowANI File "imageio\core\functions.py", line 247, in mimread File "imageio\core\imopen.py", line 277, in imopen ValueError: Could not find a backend to open `C:\Users\simon\Practice\testdir3\alpaca.gif`` with iomode `rI`. Based on the extension, the following plugins might add capable backends: pillow: pip install imageio[pillow] GIF-PIL: pip install imageio[pillow] Continue reading...