PHPmailer with attachment working on local but not on live server. Why?

I have set up phpmailer to send emails with attachment which works fine on localhost, but when uploading it to my live server I get errors:

Warning: move_uploaded_file(folder1/logo-pencil1.png): failed to open stream: No such file or directory in /home3/nkang2020/public_html/submit.php on line 35

Warning: move_uploaded_file(): Unable to move '/tmp/phpKqTVjr' to 'folder1/logo-pencil1.png' in /home3/nkang2020/public_html/submit.php on line 35

$postData = $uploadedFile = $statusMsg = '';
$msgClass = 'errordiv';
if(isset($_POST['submit'])){
    // Get the submitted form data
    $postData = $_POST;
    $email = $_POST['email'];
    $name = $_POST['name'];
    $subject = $_POST['subject'];
    $message = $_POST['message'];

    // Check whether submitted data is not empty
    if(!empty($email) && !empty($name) && !empty($subject) && !empty($message)){

        // Validate email
        if(filter_var($email, FILTER_VALIDATE_EMAIL) === false){
            $statusMsg = 'Please enter your valid email.';
        }else{
            $uploadStatus = 1;

            // Upload attachment file
            if(!empty($_FILES["attachment"]["name"])){

                // File path config
                $targetDir = "folder1/";
                $fileName = basename($_FILES["attachment"]["name"]);
                $targetFilePath = $targetDir . $fileName;
                $fileType = pathinfo($targetFilePath,PATHINFO_EXTENSION);

                // Allow certain file formats
                $allowTypes = array('pdf', 'doc', 'docx', 'jpg', 'png', 'jpeg');
                if(in_array($fileType, $allowTypes)){
                    // Upload file to the server
                    if(move_uploaded_file($_FILES["attachment"]["tmp_name"], $targetFilePath)){
                        $uploadedFile = $targetFilePath;
                    }else{
                        $uploadStatus = 0;
                        $statusMsg = "Sorry, there was an error uploading your file.";
                    }
                }else{
                    $uploadStatus = 0;
                    $statusMsg = 'Sorry, only PDF, DOC, JPG, JPEG, & PNG files are allowed to upload.';
                }
            }

            if($uploadStatus == 1){



                require 'PHPMailerAutoload.php';

                $mail = new PHPMailer;

                //$mail->SMTPDebug = 3;                               // Enable verbose debug output

                $mail->isSMTP();                                      // Set mailer to use SMTP
                $mail->Host = 'smtp.gmail.com';  // Specify main and backup SMTP servers
                $mail->SMTPAuth = true;                               // Enable SMTP authentication
                $mail->Username = 'tester@gmail.com';                 // SMTP username
                $mail->Password = 'testerpassword';                           // SMTP password
                $mail->SMTPSecure = 'tls';                            // Enable TLS encryption, `ssl` also accepted
                $mail->Port = 587;                                    // TCP port to connect to

                $mail->setFrom('test@gmail.com', $name);
                $mail->addAddress('test@gmail.com');     // Add a recipient

                $mail->addAttachment('./' . $uploadedFile);         // Add attachments
                $mail->isHTML(true);                                  // Set email format to HTML

                $mail->Subject = $name . ' requests a quote';
                $mail->Body    = 'Email: ' . $email . '<br>Due date: ' . $subject . '<br>Special Request: ' . $message;
                $mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

                if(!$mail->send()) {
                    echo 'Message could not be sent.';
                    echo 'Mailer Error: ' . $mail->ErrorInfo;
                } else {
                    // echo 'Message has been sent';
                }


                // Recipient
                $toEmail = 'test2@gmail.com';

                // Sender
                $from = 'test2@gmail.com';
                $fromName = 'CodexWorld';

                // Subject
                $emailSubject = 'Contact Request Submitted by '.$name;

                // Message 
                $htmlContent = '<h2>Contact Request Submitted</h2>
                    <p><b>Name:</b> '.$name.'</p>
                    <p><b>Email:</b> '.$email.'</p>
                    <p><b>Subject:</b> '.$subject.'</p>
                    <p><b>Message:</b><br/>'.$message.'</p>';

                // Header for sender info
                $headers = "From: $fromName"." <".$from.">";


                if(!empty($uploadedFile) && file_exists($uploadedFile)){

                    // Boundary 
                    $semi_rand = md5(time()); 
                    $mime_boundary = "==Multipart_Boundary_x{$semi_rand}x"; 

                    // Headers for attachment 
                    $headers .= "\nMIME-Version: 1.0\n" . "Content-Type: multipart/mixed;\n" . " boundary=\"{$mime_boundary}\""; 

                    // Multipart boundary 
                    $message = "--{$mime_boundary}\n" . "Content-Type: text/html; charset=\"UTF-8\"\n" .
                    "Content-Transfer-Encoding: 7bit\n\n" . $htmlContent . "\n\n"; 

                    // Preparing attachment
                    if(is_file($uploadedFile)){
                        $message .= "--{$mime_boundary}\n";
                        $fp =    @fopen($uploadedFile,"rb");
                        $data =  @fread($fp,filesize($uploadedFile));
                        @fclose($fp);
                        $data = chunk_split(base64_encode($data));
                        $message .= "Content-Type: application/octet-stream; name=\"".basename($uploadedFile)."\"\n" . 
                        "Content-Description: ".basename($uploadedFile)."\n" .
                        "Content-Disposition: attachment;\n" . " filename=\"".basename($uploadedFile)."\"; size=".filesize($uploadedFile).";\n" . 
                        "Content-Transfer-Encoding: base64\n\n" . $data . "\n\n";
                    }

                    $message .= "--{$mime_boundary}--";
                    $returnpath = "-f" . $email;

                    // Send email
                    $mail = mail($toEmail, $emailSubject, $message, $headers, $returnpath);

                    // Delete attachment file from the server
                    @unlink($uploadedFile);
                }else{
                     // Set content-type header for sending HTML email
                    $headers .= "\r\n". "MIME-Version: 1.0";
                    $headers .= "\r\n". "Content-type:text/html;charset=UTF-8";

                    // Send email
                    $mail = mail($toEmail, $emailSubject, $htmlContent, $headers); 
                }

                // If mail sent
                if($mail){
                    $statusMsg = 'Your quote request has been submitted successfully!';
                    $msgClass = 'succdiv';

                    $postData = '';
                }else{
                    $statusMsg = 'Your quote request submission failed, please try again.';
                }
            }
        }
    }else{
        $statusMsg = 'Please fill all the fields.';
    }
}
?>```