The document is a bit of a mess structurally, but I've no idea which part is causing the problem. There's an unused raster image in there, gradients which are unused, and a far too many unnecessary nested groups. It's truly horrible. It's not worth the time to fix the code TBH.

Anyway, here's how you could easily fix it in Inkscape.

1. Select each object using the Edit Paths by Nodes tool <kbd>N</kbd>. Holding down <kbd>Shift</kbd> while you click lets you make a multiple selection.

Looks like a mess at this point but don't worry

[![enter image description here][1]][1]

2. Copy using <kbd>Ctrl</kbd>+<kbd>C</kbd>

3. Do *File > New* to create a new document, and Paste <kbd>Ctrl</kbd>+<kbd>V</kbd>

4. Select everything, and do *Edit > Resize Page to Selection*.

5. Save as a Plain SVG

Here's the test in Firefox (left), and Chrome (right).  Both render perfectly.

[![enter image description here][2]][2]


  [1]: https://i.sstatic.net/CiCbs.png
  [2]: https://i.sstatic.net/hGtsU.png