captcha not working

Dear sir,

i have an issue with the capacha it doesnt work with me either by default short code or Twig code please help below is my code

default shortcode:
[msdyncrm_form entity=”lead” name=”BS Subscribe” mode=”create” captcha=”true” enable_layout=”true” hide_form=”true” message=”Your message has been successfully sent. We will contact you soon!”]

Twig version:
[msdyncrm_twig]
{% form entity=”lead” name=”BS Subscribe” mode=”create” captcha=”true” %}{% endform %}
[/msdyncrm_twig]

Regards

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