Claro

Hello people, I'm really new to the 3D-printing bussiness and trying to print flourish elements to put it on an invitation card. I created the image in photoshop and converted the layer to an 3D extrusion. I saved the file as an stl file, but wasn't able to open it with Cura and therefore couldn't print it with the Ultimaker (S3). Can anybody figure out what the problem with the file is (also I can't upload the stl file here so I'm uploading it as .png)