The Capcha function is not working properly - can you help?

The Capcha image is appearing but it is not allowing anyone to enter what they see in the box below.  Please can you help me sort this out.

The Captcha is allowing for input, however, the text is white with a white input background.  To style the captcha the same as your other text boxes, add the following CSS to your form:

#input_7 {
    background : rgba(51, 14, 8, 0.87);
    border : 1px solid #00cc99;
    border-radius : 5px;
    color : white !important;
    font-family : "Myriad Pro", "Trebuchet MS", "Helvetica Neue", Helvetica;
}

Here is how the form would look with the changes made:

https://form.jotform.com/63495419354969

You can also simply change the text color to black with the following code:

#input_7 {
    color : black !important;
}