The toUser pointer field requires a Parse.com pointer value

I have a Parse.com class called Messages where I have 3 columns:

- fromUser - Pointer<_User>
- toUser - Pointer<_User>
- image - File

      

        
        
        
      

    

In my UITableView, I am trying to restore all objects in the message class where toUser is equal to PUUser currentUser. I am getting this error when I make a request:

UserInfo=0x1702e3580 {code=102, temporary=0, error=pointer field toUser needs a pointer value, originalError=Error Domain=NSURLErrorDomain Code=-1011 "The operation couldn’t be completed. (NSURLErrorDomain error -1011.)"} {
    code = 102;
    error = "pointer field toUser needs a pointer value";
    originalError = "Error Domain=NSURLErrorDomain Code=-1011 \"The operation couldn\U2019t be completed. (NSURLErrorDomain error -1011.)\"";
    temporary = 0;
}

      

        
        
        
      

    

This is how I make the request:

- (void)retriveMessages {
    PFQuery *query = [PFQuery queryWithClassName:@"Messages"];
    [query whereKey:@"toUser" equalTo:[[PFUser currentUser] objectId]];
    [query orderByDescending:@"createdAt"];
    query.limit = 1000;
    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (error) {
            NSLog(@"Error: %@ %@", error, error.userInfo);
        } else {
            // Found messages!
            self.messages = objects;
            [self.tableView reloadData];
            NSLog(@"%@", objects);
        }
    }];
}