How to configure SublimeLinter 4.0.1

I'm using Sublime Text 3, and SublimeLinter just upgraded itself to version 4.0.1.

I've read the docs but can't work out how to get it working properly. I have tried copying the default settings into user settings and changing them but it has made no difference (this is via Preferences > Package Settings > Sublime Linter > Settings).

The gutter icons are all just white; I've tried setting it to:

"gutter_theme": "Default",

I've also tried changing the icon in styles:

"styles": [
        {
            "mark_style": "outline",
            "priority": 1,
            "scope": "region.yellowish markup.changed.sublime_linter markup.warning.sublime_linter",
            "icon": "warning",
            "types": [
                "warning"
            ]
        },
        {
            "mark_style": "outline",
            "priority": 1,
            "scope": "region.redish markup.deleted.sublime_linter markup.error.sublime_linter",
            "icon": "error",
            "types": [
                "error"
            ]
        }
    ],

The outline around error text is now incredibly faint and I can barely see it; previously it was clear and bright.

Anybody know how to configure the new version to highlight errors clearly and show different icons for warnings, errors? Thanks for any help!

(How I wish this hadn't updated itself. The docs say you can manually install an older version but that looks like another project in itself, I just want to get on with some work!)

Edit: more fiddling around and setting "mark_style": "fill", in "styles" has at least made the errors visible on the page. But I can't figure out how to get the gutter icons to be different.

Solution

It's not you, there's an open issue on GitHub. See here.