Help with File

[Claro 0]

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)

[Dustin 160]

Sadly, I don't know that anyone will be able to help you with a png..
Is likely that the .stl itself is the issue - exported corrupted (not uncommon) photoshop isn't exactly the best application for 3d models meant to 3d print.

Looking at the fine flowery bits of the lower left of your picture.. thats very complicated detail geometry wise.. its very likely the stl is corrupted.

Try removing all the plant detail and see if the exported stl is even usable from that point first.