If you need support from Yola please contact us via firstname.lastname@example.org or make use of our live chat service! We are working on a new approach to community-based support and during this transition period we are not adding any new threads to this forum. Many thanks to everyone who has participated over the years and we look forward to unveiling a new peer-to-peer support system soon!
Any chance these photos were edited in Photoshop? The problem could be that the images have a CMYK color mode attached to them - which is not web friendly. You should be able to set your color mode to RBG-16bit and you will then be able to upload them.
If that does not help, please email a copy of one of your images to email@example.com so that we can take a look.