How can I import AdminJS into my express app

I have installed the following packages @adminjs/express: ^6.0.0, @adminjs/mongoose: 4.0.0, and adminjs: ^7.0.0. In my app.js file I am importing them as per the docs as follows:

import AdminJS from 'adminjs'
import * as AdminJSExpress from '@adminjs/express'

But when I run the app I get the following error:

file:///C:/Users/USER01/github/express-template/node_modules/adminjs/lib/locale/index.js:1
import deLocale from './de/translation.json' assert { type: 'json' };
                                             ^^^^^^

SyntaxError: Unexpected identifier
    at Loader.moduleStrategy (internal/modules/esm/translators.js:145:18)

Can anyone help?
In my package.json I have set "type":"module". My node version is v14.17.3