Radio buttons and Group checkboxes not working

We have been using your plugin for years and it has served us well.
Until now we were just collecting name and email address, but we have now changed our list to include a whole lot of new fields, such as Gender, birthdate etc and we have also created Interest Groups on MailChimp.

I have gone into WordPress and updated our Form on your plugin, however the Gender field (radio buttons) just comes up as inline text, and all the Interest Groups do not come up as checkboxes, but as inline text as well.

I also tried uninstalling the plugin and reinstalling the application, but that did not work.

Here is the code on our form, created by the plugin button:

<p>
    <label>Gender</label>
    <label>
        <input name="M_GENDER" type="radio" value="Male" required=""> <span>Male</span>
    </label>
    <label>
        <input name="M_GENDER" type="radio" value="Female" required=""> <span>Female</span>
    </label>
    <label>
        <input name="M_GENDER" type="radio" value="Prefer not to say" required=""> <span>Prefer not to say</span>
    </label>
</p>

<p>
    <label>Buddhist Courses and Events</label>
    <label>
        <input name="INTERESTS[bbdc69d3db][]" type="checkbox" value="d76065b2ae"> <span>I am new to Buddhism</span>
    </label>
    <label>
        <input name="INTERESTS[bbdc69d3db][]" type="checkbox" value="54207b2819"> <span>Meditation</span>
    </label>
    <label>
        <input name="INTERESTS[bbdc69d3db][]" type="checkbox" value="01b8a3b19c"> <span>Retreats</span>
    </label>
    <label>
        <input name="INTERESTS[bbdc69d3db][]" type="checkbox" value="b759a6dfe0"> <span>Art Workshops</span>
    </label>
    <label>
        <input name="INTERESTS[bbdc69d3db][]" type="checkbox" value="1afe6b3da2"> <span>Study Programs</span>
    </label>
</p>
<p>
    <label>Wellbeing Courses and Events</label>
    <label>
        <input name="INTERESTS[9d56eb03a3][]" type="checkbox" value="d3b0637ded"> <span>Mindfulness</span>
    </label>
    <label>
        <input name="INTERESTS[9d56eb03a3][]" type="checkbox" value="4843c45b2a"> <span>Yoga</span>
    </label>
    <label>
        <input name="INTERESTS[9d56eb03a3][]" type="checkbox" value="8bb83d5304"> <span>Cultivating Emotional Balance</span>
    </label>
    <label>
        <input name="INTERESTS[9d56eb03a3][]" type="checkbox" value="d529cfbeee"> <span>Art Therapy</span>
    </label>
    <label>
        <input name="INTERESTS[9d56eb03a3][]" type="checkbox" value="08168a4dd7"> <span>Vegetarian Cooking</span>
    </label>
    <label>
        <input name="INTERESTS[9d56eb03a3][]" type="checkbox" value="3a5df4ed7a"> <span>Tools for Wellbeing</span>
    </label>
</p>
<p>
    <label>Social and Community Events</label>
    <label>
        <input name="INTERESTS[7108154a63][]" type="checkbox" value="ba3ca65e6c"> <span>Social And Community Events</span>
    </label>
</p>