My guess too is a name problem. Either the filename itsself or the folder where the image goes to. Try to change that and try not to use special characters - in a first test go back to the old DOS thingie - 8+3. And only standard characters. No "/", ".", " ", etc in the name. AND, maybe you try a different file format. I dont know what you have used right now, but change that. To jpg for example (if you haven't used that already).

One day your ship comes in - but you're at the airport.