Errors on appear

Hi appear features dont seem to be working correctly. Even public workflows are giving errors. TIFF files are not working correctly the first image is shown but the rest images are not displayed. In previous annotations where I used TIFF file format the previous annotations are being shown but the image is not displayed. I have contacted the appear team multiple times but have not received any update and the problems have not been solved. It has been more than a month.

I may meet a similar problem. download the Labeled tiff file and there only background classes but there should be multiple classes in the picture. No other channel for other labeled classes