Not working with Polymer Starter Kit

[chwzr]

Description

I've installed it on a blank polymer 3 starter kit.
got following error:
Failed to execute 'define' on 'CustomElementRegistry': this name has already been used with this registry

Is this bc there is a separate @Polymer node_module installed in subfolder?

Steps to reproduce

1. polymer init --> polymer starter kit 3

2. npm install @polymer/paper-input --save

3. import like in the docs..

4. polymer serve

5. see error in console:

Uncaught (in promise) DOMException: Failed to execute 'define' on 'CustomElementRegistry': this name has already been used with this registry
    at Polymer (http://localhost:8081/node_modules/@polymer/polymer/lib/legacy/polymer-fn.js:43:18)
    at http://localhost:8081/node_modules/@polymer/iron-input/node_modules/@polymer/iron-meta/iron-meta.js:141:1

[fagnercarvalho]

To anyone that got here I resolved this issue by running:

• rm-rf node_modules package-lock.json
• npm i

[chwzr]

exactly this is solving the issue.