Uncaught Error: Assertion Failed: The `element` helper polyfill encountered an unexpected error

[glbatistabh]

Hi! Please can someone help me with this error? I can't solve it and I'm thinking it's a bug.

Error:

Uncaught Error: Assertion Failed: The `element` helper polyfill encountered an unexpected error. Please report the issue at http://github.com/tildeio/ember-element-helper with the usage and conditions that caused this error.
    at assert (index.js:181:1)
    at element.js:14:1
    at index.js:5258:1
    at deprecateMutationsInTrackingTransaction (validator.js:191:1)
    at index.js:5257:1
    at SimpleClassicHelperManager.getValue (index.js:5268:1)
    at manager.js:971:1
    at reference.js:170:1
    at track (validator.js:835:1)
    at valueForRef (reference.js:169:1)

package.json

shell>cat package.json | grep leaflet
    "ember-leaflet": "^5.0.1",
    "leaflet": "^1.8.0",

Environment:

shell>ember -v
ember-cli: 3.28.5
node: 14.15.5
os: linux x64

Printscreen: