Thank you for the feedback. In my instructions it states to select the parent directory not the folder the image sequence is in. On that note however I will make it so you can select the sequence directory directly in the next version so this should be resolved shortly.
Generate Sprite sheet can not work in blender 4.2。 Although it shows that it has been generated normally, it is not actually generated, and no generated pictures pop up automatically, and it cannot be found in the folder