unknown property "fill-extrusion-vertical-gradient"

[Mark Davies]

I'm using the local Maputnik editor to style a map that is hosted on my own server that is running TileServer GL

In Data Sources i've set TileJSON URL to
https://myIP:8081/data/v3.json

Everything looks good in Maputnik v1.7.0 running on http://localhost:8000/ and no errors
When I export the json file and upload it to the server location /styles/osm-liberty2/style.json
I get the following errors

I'm using the URL to view the map:
https://myIP:44300/styles/osm-liberty2/#4.92/17.13/-13.92

Are these unsupported features on TileServer GL or perhaps i'm doing something wrong?
In the editor, the Style Renderer is set to MapboxGL JS

[Mark Davies]

found the issue, i'm using an old version
removing this fixed it for now
"fill-extrusion-vertical-gradient": false