error from PostCSS plugin. Your current PostCSS version is 7.0.39, but autoprefixer uses 6.0.23. Per haps this is the source of the error below.

The error you are encountering indicates a version mismatch between your current PostCSS version (7.0.39) and the version (6.0.23) used by autoprefixer. Autoprefixer requires a specific version of PostCSS to function correctly.

To resolve this issue, you can try the following steps:

1. Update autoprefixer: You can attempt to update the autoprefixer package to a version that is compatible with PostCSS 7. You can do this by running the following command in your project directory:

   npm install autoprefixer@latest --save-dev

2. Update PostCSS: If updating autoprefixer alone doesn't resolve the issue, you may need to update your PostCSS version to a compatible one. Run the following command to update PostCSS:

   npm install postcss@latest --save-dev

After performing these steps, rebuild your project and check if the error persists. If it does, you may need to review your project configuration and ensure that all plugins and dependencies are compatible with each other.