Sharing: Email share button producing error "Email check failed, please try again"

[donalirl]

Steps to reproduce the issue

1. Use the Email share button on any post, such as this: https://eatkibbeling2.wordpress.com/2018/01/15/new-post-%F0%9F%8E%89/
2. Input an email address and press 'Send Email'

What I expected

I expected the post to be shared by email.

What happened instead

The error Email check failed, please try again appeared in a red box:

The result is the same after testing multiple, valid email addresses.

[jeherve]

I can't seem to be able to reproduce; the problem appears to be limited to WordPress.com sites only, and may be linked to our implementation of Google Recaptcha there: as you can see there is space for the Recaptcha challenge box but it does not appear in the window. We can also see a JavaScript error on the page:

Uncaught TypeError: Cannot set property 'innerHTML' of null

Here is the line that is concerned: e("recaptcha_challenge_field_holder").innerHTML = "<input type='hidden' name='recaptcha_challenge_field' id='recaptcha_challenge_field' value='" + d.challenge + "'/>";

I would suggest that you create a new ticket on wpcom.trac to keep track of this issue.

Thank you!