Image Field: Is it possible to upload an .svg image?

Also- Logo at the top on same form is SVG format. It used to work but now it does not?

As far as I tested seems like the .svg file will not be uploaded to our server, this seems to be due to security reasons since the .svg files can run scripts something that images like .png will not do, what I would suggest you is to upload your image to another cloud service and then provide the link in the image wizard, this way it should work. 

I have tested on this form and it worked: https://form.jotform.com/63427394969978 

Please give it a try and let us know if you have any question.