title: Bad file name error in Parse
body: <p>I sometimes got this message when I upload PFFile to User class:</p>
  
  <pre><code>[Error]: Bad file name: profileImage.png (Code: 122, Version: 1.13.0)
  </code></pre>
  
  <p>Here is the code</p>
  
  <pre><code>PFUser *currentUser = [PFUser currentUser];
  NSData *imageData = UIImagePNGRepresentation(profileImageView.image);
  PFFile *imageFile = [PFFile fileWithName:@"profileImage.png" data:imageData];
  currentUser[@"profileImageFile"] = imageFile;
      [currentUser saveInBackgroundWithBlock:^(BOOL succeeded, NSError * _Nullable error) {
          if(!succeeded){
              NSLog(@"error:%@",error);
          }
      }];
  }
  </code></pre>
  
  <p>Is this really bad file name? Someone go well to upload PFFile with this file name.</p>