npm purgecss error

[postcss] ...prod mode detected, purging css
Hash: d1f9561b23eda5f7f0f9
Version: webpack 4.42.0
Time: 4017ms
Built at: 03/02/2020 11:12:02 PM
 1 asset
Entrypoint ./js/app.js = app.js
[0] multi ./js/app.js 28 bytes {0} [built]
[1] ./js/app.js 493 bytes {0} [built]
[2] ./css/app.css 1.36 KiB {0} [built]
[3] ./node_modules/mini-css-extract-plugin/dist/loader.js!./node_modules/css-loader??ref--5-2!./node_modules/postcss-loader/src!./css/app.css 1.05 KiB {0} [built] [failed] [1 error]
[6] ../deps/phoenix_html/priv/static/phoenix_html.js 2.17 KiB {0} [built]
    + 2 hidden modules

ERROR in ./css/app.css (./node_modules/mini-css-extract-plugin/dist/loader.js!./node_modules/css-loader??ref--5-2!./node_modules/postcss-loader/src!./css/app.css)
Module build failed (from ./node_modules/mini-css-extract-plugin/dist/loader.js):
ModuleBuildError: Module build failed (from ./node_modules/postcss-loader/src/index.js):
TypeError: Class constructor TailwindExtractor cannot be invoked without 'new'
    at extractSelectors (/apps/builds/ElixirConf/assets/node_modules/purgecss/lib/purgecss.js:1:2432)
    at PurgeCSS.extractSelectorsFromFiles (/apps/builds/ElixirConf/assets/node_modules/purgecss/lib/purgecss.js:1:5953)
    at async /apps/builds/ElixirConf/assets/node_modules/postcss-purgecss/lib/postcss-purgecss.js:1:563
    at /apps/builds/ElixirConf/assets/node_modules/webpack/lib/NormalModule.js:316:20
    at /apps/builds/ElixirConf/assets/node_modules/loader-runner/lib/LoaderRunner.js:367:11
    at /apps/builds/ElixirConf/assets/node_modules/loader-runner/lib/LoaderRunner.js:233:18
    at context.callback (/apps/builds/ElixirConf/assets/node_modules/loader-runner/lib/LoaderRunner.js:111:13)
    at /apps/builds/ElixirConf/assets/node_modules/postcss-loader/src/index.js:208:9
 @ ./css/app.css 2:14-181
 @ ./js/app.js
 @ multi ./js/app.js
Child mini-css-extract-plugin node_modules/css-loader/index.js??ref--5-2!node_modules/postcss-loader/src/index.js!css/app.css:
    Entrypoint mini-css-extract-plugin = *
    [0] ./node_modules/css-loader??ref--5-2!./node_modules/postcss-loader/src!./css/app.css 499 bytes {0} [built] [failed] [1 error]

    ERROR in ./css/app.css (./node_modules/css-loader??ref--5-2!./node_modules/postcss-loader/src!./css/app.css)
    Module build failed (from ./node_modules/postcss-loader/src/index.js):
    TypeError: Class constructor TailwindExtractor cannot be invoked without 'new'
        at extractSelectors (/apps/builds/ElixirConf/assets/node_modules/purgecss/lib/purgecss.js:1:2432)
        at PurgeCSS.extractSelectorsFromFiles (/apps/builds/ElixirConf/assets/node_modules/purgecss/lib/purgecss.js:1:5953)
        at async /apps/builds/ElixirConf/assets/node_modules/postcss-purgecss/lib/postcss-purgecss.js:1:563

Check your digested files at "priv/static"