Unexpected token after updating to 5.3.5

[vishalsatam]

I keep seeing this error after updating to version 5.3.5 from 3.4.9. I had to use umd-compat-loader earlier to be able to build this but now I'm seeing the below error. Please help.

./node_modules/vscode-json-languageservice/lib/esm/jsonLanguageService.js 29:23
Module parse failed: Unexpected token (29:23)
File was processed with these loaders:
 * ./node_modules/babel-loader/lib/index.js
 * ./node_modules/umd-compat-loader/index.js
You may need an additional loader to handle the result of these loaders.
|     configure: settings => {
|       jsonSchemaService.clearExternalSchemas();
>       settings.schemas?.forEach(jsonSchemaService.registerExternalSchema.bind(jsonSchemaService));
|       jsonValidation.configure(settings);
|     },

[zardoy]

#168 (comment)