Custom Shape Map reading incorrectly and creating abstract art

Hi all,

I am relatively new to Power BI and trying to create a custom Shape Map. I have downloaded a GeoJSON that I have converted to TOPOJSON on Mapshaper, that when tested opens correctly in QGIS (image below).

However, when I try to open it in Power BI it turns into a weird geometric pattern.

Anyone ever had a similar problem? Or know what I have done wrong?

Thanks 🙂