Are you talking about the upload of the guide frames? At the moment the UI doesn't give visual feedback on that, but I would like to add something to show that the files were successfully uploaded (perhaps a number indicating how many frames are currently uploaded)
As for the image outputs, the individual frames should appear in the "stable-diffusion-webui\outputs\img2img-images" folder and should be named along the lines of "Frame-0001" and the spritesheets should be saved to "stable-diffusion-webui\outputs\img2img-grids" with names such as "grid-0001" although the filename for this is subject to change in future updates.
Both the spritesheet and the individual frames should properly output to the GUI and do on my end. Does nothing get returned for you or what exactly are you getting?