It would appear that there were two issues with the model. The first was that the SVG file had an open path meaning that the lines had “breaks” in them which the slicer couldn’t render. That showed as an exclamation mark.
For the sake of expediency, I brought the file into Inkscape (an open-source, free SVG editor) and flattened it to a single grayscale color. This is not unusual, as the SVG file format includes many optional features and is a poorly implemented specification. Consequently, many programs struggle with it.
I replaced the SVG file with a flat file (simplified SVG) in a single color, which is easier for most programs to process. While this approach doesn’t always work, it did in this case.
Please try out this file and see if it works.
winnie the pooh - test - ver II gray path.3mf (1.5 MB)
If your goal was to do a multicolor SVG, then you may have to experiment with an SVG editor like Inkscape and simplify the paths on your own. This is a trial and error process.
You can download Inkscape from the Microsoft Windows App store for free.
Or if you’re already familiar with Adobe Illustrator, the paid version is more feature rich.