Identify the error in this file validation pipe code:

Identify the error in this file validation pipe code:

export class FileValidationPipe implements PipeTransform {
  transform(file: Express.Multer.File) {
    if (!file) throw new BadRequestException('File is required');
    if (file.mimetype !== 'image/png' || file.mimetype !== 'image/jpeg') {
      throw new BadRequestException('Invalid file type');
    }
    return file;
  }
}