I’ve been having the same issue since last Wednesday, July 29. I get the same SSL error message everytime I try to upload a photo or mockup. I contacted support and opened a ticket last late week and they have been unable to resolve the issue. I use Google Chrome as my default browser and I tried different browsers and cleared cache, etc. and it’s not resolving the issue. The last message I received from Stephen in tech support/customer care this morning is that he’s having someone in the creator community take a look at it.