If my memory serves me right, that error comes up when the pic you are trying to post is too big. I think the maximum size 200Kb, if your phone displays the size in MB, then I think it has to be 1MB or less.
You can try cropping the pic but that doesn't always work because while it makes the pic smaller, it doesn't impact the file size much. You can try to change the setting of the camera so that it takes smaller pics or get a photo editor app. I use a photo editor because it's easier and it reduces the file size without impacting the quality.
Turtles: omg please don't put that in your moo moo