nitrinox

Hello, I have a problem. After updating, it displays the message. “Undefined value was submitted through this field.”

What’s wrong? Maybe someone can solve the problem?

<div class="section">
                                    <label class="label">Task</label>
                                    <label class="input">
                                        <i class="input-icon-append icon-tag"></i>
                                        [select kurs multiple id:courses-list class:form-control include_blank]
                                    </label> 

• This reply was modified 2 months, 1 week ago by nitrinox.
• This reply was modified 2 months, 1 week ago by nitrinox.
• This reply was modified 2 months, 1 week ago by nitrinox.