Doesn't work at all on Atom 1.21.1 on Sierra

I just upgraded Atom to 1.21.1 and Pigments to 0.40.2 on MacOS 10.12.6, and now I'm getting no functionality whatsoever from Pigments: no colors are highlighted or found in my project, and if I run Pigments: Reload, I see that it found lots of variables (in SCSS) but no colors. I've tried uninstalling and reinstalling Pigments several times. Help?

Pigments report, if it's useful...

```json
{
"atom": "1.21.1",
"pigments": "0.40.2",
"platform": "darwin",
"config": {
"sortPaletteColors": "by name",
"traverseIntoSymlinkDirectories": false,
"sourceNames": [
"**/*.css",
"**/*.styl",
"**/*.stylus",
"**/*.less",
"**/*.sass",
"**/*.scss"
],
"ignoredNames": [
"vendor/*",
"node_modules/*",
"spec/*",
"test/*"
],
"ignoredBufferNames": [],
"extendedSearchNames": [
"**/*.css"
],
"supportedFiletypes": [
"*"
],
"filetypesForColorWords": [
"css",
"less",
"styl",
"stylus",
"sass",
"scss"
],
"ignoredScopes": [],
"autocompleteScopes": [
".source.css",
".source.css.less",
".source.sass",
".source.css.scss",
".source.stylus"
],
"extendAutocompleteToVariables": false,
"extendAutocompleteToColorValue": false,
"autocompleteSuggestionsFromValue": false,
"maxDecorationsInGutter": 100,
"markerType": "native-background",
"sassShadeAndTintImplementation": "compass",
"groupPaletteColors": "none",
"mergeColorDuplicates": false,
"delayBeforeScan": 500,
"ignoreVcsIgnoredPaths": true,
"notifyReloads": true,
"dismissableReloadNotifications": true
},
"project": {
"config": {
"sourceNames": [],
"searchNames": [],
"ignoredNames": [],
"ignoredScopes": []
},
"paths": [(omitted)],
"variables": {
"colors": 0,
"total": 67
}
}
}
```