Error "Module parse failed: Unexpected token (105:45); You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders"

[SciManJD]

I cannot make it running. I get this message:

Module parse failed: Unexpected token (105:45)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
|   for (const d of l.getElementsByTagName("span")) {
|     let U = d.textContent;
>     const Z = JSON.parse(d.dataset.l10nArgs ?? "{}");
|     if (U)
|       for (const F in Z)

I need a little help, please...