JSFiddle - React, Tailwind, and code Playground

HTML

<form method="post" action="index?idc=34122" id="form1" class="container body-content">
    <div class="row">
        <div class="col-md-10">
            <table id="RadioButtonList1" cellspacing="15" cellpadding="15">
                <tr>
                    <td>
                        <input id="RadioButtonList1_0" type="radio" name="RadioButtonList1" value="1" />
                        <label for="RadioButtonList1_0">opc 01</label>
                    </td>
                </tr>
                <tr>
                    <td>
                        <input id="RadioButtonList1_1" type="radio" name="RadioButtonList1" value="2" />
                        <label for="RadioButtonList1_1">opc 02</label>
                    </td>
                </tr>
                <tr>
                    <td>
                        <input id="RadioButtonList1_2" type="radio" name="RadioButtonList1" value="3" />
                        <label for="RadioButtonList1_2">opc 03</label>
                    </td>
                </tr>
                <tr>
                    <td>
                        <input id="RadioButtonList1_3" type="radio" name="RadioButtonList1" value="4" />
                        <label for="RadioButtonList1_3">opc 04</label>
                    </td>
                </tr>
                <tr>
                    <td>
                        <input id="RadioButtonList1_4" type="radio" name="RadioButtonList1" value="5" />
                        <label for="RadioButtonList1_4">opc 5</label>
                    </td>
                </tr>
            </table>
            <input type="submit" name="Button1" value="Votar" id="Button1" class="btn btn-primary" />
        </div>
    </div>
</form>

JavaScript

jQuery(function () {
     jQuery('#form1').on('submit', checkRadio);
 })

 function checkRadio() {
     var isChecked = jQuery("input[name=fileType]:checked").val();

     var booleanVlaueIsChecked = false;
     if (!isChecked) {
         booleanVlaueIsChecked = true;
         alert('Selecione algum logotipo');
         return false;
     }
 }