Terser error: unknown field extractComments

[techbridgedev]

Builds are failing with multiple errors (example below):

assets/js/9206.e37e4cb3.js from Terser plugin
unknown field `extractComments`, expected one of `parse`, `compress`, `mangle`, `format`, `output`, `ecma`, `keepClassnames`, `keep_classnames`, `keepFnames`, `keep_fnames`, `module`, `safari10`, `toplevel`, `sourceMap`, `sourceMapIgnoreList`, `outputPath`, `inlineSourcesContent`, `emitSourceMapColumns` at line 1 column 151

Docusaurus v3.10.1.

At first I thought is was because I updated dependencies, but rolling back doesn't fix it. One previous deployment with the previous dependency tree worked.

The only other change from the previous deployment was I replaced a downloadable asset (a ZIP file). No pages or posts updated, no changes to my configuration.

I've tried deleting and reinstalling node_modules; deleting the build directory and rebuilding, running npm ci; none of these work.

FWIW, npm run start works for local production.

[slorber]

Sorry but it's impossible to do anything without a minimal repro.