Send Button Visible but inactive

Hey all,

I urgently need help on this issue.
my contact form cannot be sent to me, as the ‘Send’ Button is not active.

im using the version 4.9.2 of both wordpress and the plugin.

I tried to update the plugin Contact Form7 to version 5, but its the same state for the button Send, with a red border in addition.

the code in the form is:

<label> Your Name (required)
    [text* your-name] </label>

<label> Your Email (required)
    [email* your-email] </label>

<label> Subject
    [text your-subject] </label>

<label> Your Message
    [textarea your-message] </label>

[recaptcha size:compact]

[submit "Send"]

Thanks a lot in advance

The page I need help with: [log in to see the link]