PHP - Filling Checkboxes

<form action=".php" name="absence" id="absence" method="post">

Employee:
<select name="empid" class="clockinputs" required> 
<option value=""></option>
<option value='20'>Bob Jones</option>
<option value='13'>Bob Phones</option>
<option value='93'>Bob Lomes</option>
<option value='30'>Bob Somes</option>
<option value='107'>Bob Pomes</option>
<option value='74'>Bob Womes</option>
</select>

Shift Start: <input type="text" name="startshift" id="startshift" class="clockinputs" data-inputmask="'mask': '99:99:99'" required>
Shift End: <input type="text" name="endshift" id="endshift" class="clockinputs" data-inputmask="'mask': '99:99:99'" required>

<input type="hidden" name="eid" value="<?php echo $row{'EID'}; ?>">
<input type="submit" value="Save">
</form>

<script type="text/javascript">
    jQuery(document).ready(function(){
        jQuery('#empid').live('change', function(event) {
            $.ajax({
                url     : 'absence-get.php',
                type    : 'POST',
                dataType: 'json',
                data    : $('#absence').serialize(),
                success: function( data ) {
                       for(var id in data) {        
                              $(id).val( data[id] );
                       }
                }
            });
        });
    });
    </script>

<?php
$e = $_POST['empid'];

$result = mysql_query("SELECT * FROM employees WHERE EID='$e' ");
$row = mysql_fetch_array($result, MYSQL_ASSOC)

$startshift = $row{'startshift'};
$endshift = $row{'endshift'};

$arr = array( 'input#startshift' => $startshift , 'input#endshift' => $endshift );
echo json_encode( $arr );
?>

Here's my code, whenever I try to fill the form it gives me that error "Oops! Something went wrong. Please try again later"

Code: 

<?php
// Include config file
require_once "config.php";
 
// Define variables and initialize with empty values
$CodEntrega = $CodCliente = $Dia = $Pagamento = $Funcionario = "";
$CodEntrega_err = $CodCliente_err = $Dia_err = $Pagamento_err = $Funcionario_err = "";
 
// Processing form data when form is submitted
if($_SERVER["REQUEST_METHOD"] == "POST"){
    // Validate name
    $input_CodEntrega = trim($_POST["CodEntrega"]);
    if(empty($input_CodEntrega)){
        $CodEntrega_err = "Insira o codigo de entrega";
    } else{
        $CodEntrega = $input_CodEntrega;
    }
    
    // Validate address
    $input_CodCliente = trim($_POST["CodCliente"]);
    if(empty($input_CodCliente)){
        $CodCliente_err = "Insira o codigo do cliente";     
    } else{
        $CodCliente = $input_CodCliente;
    }
    
    // Validate salary
    $input_Dia = trim($_POST["Dia"]);
    if(empty($input_Dia)){
        $Dia_err = "Insira a data da entrega"; 
    } else{
        $Dia = $input_Dia;
    }
    
    $input_Pagamento = trim($_POST["Pagamento"]);
    if(empty($input_Pagamento)){
        $Pagamento_err = "Insira o tipo de pagamento"; 
    } else{
        $Pagamento = $input_Pagamento;
    }
    
    $input_Funcionario = trim($_POST["Funcionario"]);
    if(empty($input_Funcionario)){
        $Funcionario_err = "Insira o codigo do funcionario"; 
    } else{
        $Funcionario = $input_Funcionario;
    }
    
    if(empty($CodEntrega_err) && empty($CodCliente_err) && empty($Dia_err) && empty($Pagamento_err) && empty($Funcionario_err)){
       
        $sql = "INSERT INTO entrega(CodEntrega, CodCliente, Dia, Pagamento, Funcionario) VALUES (?, ?, ?, ?, ?)";
         
        if($stmt = mysqli_prepare($link, $sql)){
            // Bind variables to the prepared statement as parameters
            mysqli_stmt_bind_param($stmt, "ssdss", $param_CodEntrega, $param_CodCliente, $param_Dia, $param_Pagamento, $param_Funcionario);
            
            // Set parameters
            $param_CodEntrega= $CodEntrega;
            $param_CodCliente = $CodCliente;
            $param_Dia = $Dia;
            $param_Pagamento = $Pagamento;
            $param_Funcionario = $Funcionario;
            
            if(mysqli_stmt_execute($stmt))
            {
                header("location: home.html");
                exit();
            } 
            else
            {
                echo "Oops! Something went wrong. Please try again later.";
            }
        }
         
        // Close statement
        mysqli_stmt_close($stmt);
    }
    
    // Close connection
    mysqli_close($link);
}
?>
 
<!DOCTYPE html>
<html lang="en">
<head>
<title>Projeto TW</title>
<link rel="stylesheet" href="css/milligram.css">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
* {
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
}

/* Style the header */
header {
  background-color: #B0171F;
  padding: 30px;
  text-align: center;
  font-size: 35px;
  color: white;
}

/* Create two columns/boxes that floats next to each other */
nav {
  float: left;
  width: 30%;
  height: 300px; /* only for demonstration, should be removed */
  background: #ccc;
  padding: 20px;
}

/* Style the list inside the menu */
nav ul {
  list-style-type: decimal;
  padding: 0;
}

article {
  float: left;
  padding: 20px;
  width: 70%;
  background-color: #f1f1f1;
  height: 300px; /* only for demonstration, should be removed */
}

/* Clear floats after the columns */
section::after {
  content: "";
  display: table;
  clear: both;
}

/* Style the footer */
footer {
  background-color: #B0171F;
  padding-top: 7px;
  padding-bottom: 7px;
  text-align: middle;
  color: white;
  position: relative;
  bottom: 0;

}

#content-wrap {
  padding-bottom: 2rem;    /* Footer height */
}

#page-container {
  position: relative;
 
}

@media (max-width: 600px) {
  nav, article {
    width: 100%;
    height: auto;
  }
}

.dropbtn {
  background-color: #4CAF50;
  color: white;
  padding: 16px;
  font-size: 16px;
  border: none;
}


.dropdown {
  position: relative;
  display: inline-block;
}


.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f1f1f1;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}


.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}


.dropdown-content a:hover {background-color: #ddd;}


.dropdown:hover .dropdown-content {display: block;}


.dropdown:hover .dropbtn {background-color: #3e8e41;}

</style>
</head>
<body>


<header>
  <div class="head1">PROJETO DE TW</div> 
  <div class="head2">Gestão de uma BD</div>
</header>

<div class='container'>
      <div class='navbar'>
        <ul>
          <li><a class="active" href="home.html">Home</a></li>
          <li><a href="#consultar">Consultar</a></li>
          <li><a href="tabela.html">Inserir</a></li>
          <li><a href="#alterar">Alterar</a></li>
          <li><a href="#eliminar">Eliminar</a></li>
        </ul>
      </div> 
   <div class = "body_sec"> 
      <section id="Content"> 
         <h3>INSERIR DADOS DE ENTREGA</h3>
         <button type="button" >ENTREGA</button>         
      </section>
                    <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
                        <div class="form-group">
                            <label>CodEntrega</label>
                            <input type="text" name="CodEntrega" class="form-control <?php echo (!empty($CodEntrega_err)) ? 'is-invalid' : ''; ?>" value="<?php echo $CodEntrega; ?>">
                            <span class="invalid-feedback"><?php echo $CodEntrega_err;?></span>
                        </div>
                        <div class="form-group">
                            <label>CodCliente</label>
                            <input type="text" name="CodCliente" class="form-control <?php echo (!empty($CodCliente_err)) ? 'is-invalid' : ''; ?>" value="<?php echo $CodCliente; ?>">
                            <span class="invalid-feedback"><?php echo $CodCliente_err;?></span>
                        </div>
                        <div class="form-group">
                            <label>Dia de Entrega</label>
                            <input type="date" name="Dia" class="form-control <?php echo (!empty($Dia_err)) ? 'is-invalid' : ''; ?>" value="<?php echo $Dia; ?>">
                            <span class="invalid-feedback"><?php echo $Dia_err;?></span>
                        </div>
                        <div class="form-group">
                            <label>Pagamento</label>
                            <input type="text" name="Pagamento" class="form-control <?php echo (!empty($Pagamento_err)) ? 'is-invalid' : ''; ?>" value="<?php echo $Pagamento; ?>">
                            <span class="invalid-feedback"><?php echo $Pagamento_err;?></span>
                        </div>
                        <div class="form-group">
                            <label>Codigo do Funcionario</label>
                            <input type="text" name="Funcionario" class="form-control <?php echo (!empty($Funcionario_err)) ? 'is-invalid' : ''; ?>" value="<?php echo $Funcionario; ?>">
                            <span class="invalid-feedback"><?php echo $Funcionario_err;?></span>
                        </div>
                        <input type="submit" class="btn btn-primary" value="Submit">
                        <a href="home.html" class="btn btn-secondary ml-2">Cancel</a>
                    </form>
                </div>
            </div>        
        </div>
    </div>
</body>
</html>