ReCAPTCHA placeholder element must be empty

[Andrii Mutylo]

When load and form with reCaptcha appear 
i got js error ReCAPTCHA placeholder element must be empty 
Can't submit form.

Anybody can help me, please

[dho...@gmail.com]

I got the same issue and in my case it was silly stupid. In my case i did not have explicit closing tag for div that holds reCaptcha:

<div key="" />

as opposed to 

<div key=""></div>

and during html minification process it was removing forward slash breaking the DOM

[Yuri Suarez]

I have the same issue when I place the reCaptcha in a modal and the modal load again. If any have solved this?

[Yuri Suarez]

Found the issue:

https://www.google.com/recaptcha/api.js

was loading twice, inspect elements and find the library. If you do view source, you are not going to see the latest changes in the DOM