Every time I tried to upload an background transparent PNG, it shows "Invalid file format.Only 8 bit gray scale or 24 bit RGB of file type JPG or PNG are allowed." I have search through the forum but no solution was found. Although the Vuforia Engine Support replied to the people who have the same problem with the same answer :
Image must be in one of the supported formats: PNG or JPEG
Image must either be grayscale or RGB-24 bit.
This means that 32-bit images with an alpha channel (RGB + Alpha) are not allowed.
Image size does not exceed 2 MB
But it is still not working.
Is there anyone can help me?