uploading photos

I uploaded an image on Gamma.io but somehow the image was loaded sideway instead horizontal or upright. However, the image was uploaded in an upright position but somehow placed in a sideways position on Gamma.io

There's no option on gamma.io to rotate the image back into it's original format/position. Any suggestions on how to get the image rotated into the correct upright position because I'm assuming other uploads will be positioned sideways, since it was done to the first uploaded image.