Conflict between NextGen and e-Newsletter

When e-Newsletter is active with NextGen Gallery, I get the following error in the console when the template editor is enabled:

?customize_changeset_uuid=da47eaf9-7a26-486d-a00e-aef444c861d9&customize_theme=iletter&customize_messenger_channel=preview-0:275 Uncaught ReferenceError: jQuery is not defined
    at ?customize_changeset_uuid=da47eaf9-7a26-486d-a00e-aef444c861d9&customize_theme=iletter&customize_messenger_channel=preview-0:275

And once NextGen is inactive then the error disappears.

Thanks in advance!