"Unknown property" error, what to do?

Question

css

That means I have a block that works normally, adaptive like this:



I insert CSS block in style.css in Modx REVO and gives errors:




How to be?

Answer 1

https://developer.mozilla.org/en/docs/Web/CSS/grid-gap

Deprecated
This feature has been removed from the web standards. Although some browsers may still support it, it is in the process of being removed. Do not use it in old or new projects. Pages or web applications that use it can break at any time.
Note. The divider grid CSS property has been renamed to the prefix-less gap property.

Answer 2

mb through prefixes to try?