Parse CloudCode Notification Not Receiving Success Response

Question

Update:

The issue ended up being that I was using sample cloud code for parse 3+, and this app was using 2.X. I had to add a 'response' after the request part of cloud code. Once I did that, it worked fine.

It's pretty much all there in the title for the problem I am experiencing. I have CloudCode set up with my Parse app on back4app to send targeted push notifications when a certain action is performed within the app. The notification sends immediately with no problem, but it doesn't return that it was actually successful in its notification. About a minute after it sends the notification, it will return an error message of

"The request timed out. (Code: 100, Version: 1.14.2)"

It then retries it, and AGAIN successfully sends the push, but doesn't ever register it did it properly. The full verbose language I get for the error message is:

<4> finished with error [-1001] Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo={_kCFStreamErrorCodeKey=-2102, NSUnderlyingError=0x6000004f23a0 {Error Domain=kCFErrorDomainCFNetwork Code=-1001 "(null)" UserInfo={_kCFStreamErrorCodeKey=-2102, _kCFStreamErrorDomainKey=4}}, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <90826051-6A6B-46ED-BAE8-1CDF082B2465>.<4>, _NSURLErrorRelatedURLSessionTaskErrorKey=(
    "LocalDataTask <90826051-6A6B-46ED-BAE8-1CDF082B2465>.<4>"
), NSLocalizedDescription=The request timed out., NSErrorFailingURLStringKey=https://parseapi.back4app.com/functions/invitationNotification, NSErrorFailingURLKey=https://parseapi.back4app.com/functions/invitationNotification, _kCFStreamErrorDomainKey=4}

The cloud code I am using is:

Parse.Cloud.define("invitationNotification", (request) => {
let userId = request.params.theUserId;
let query = new Parse.Query(Parse.Installation);
    query.equalTo("userId", userId);
    
    return Parse.Push.send({
        where: query,
         data: {
      alert: "MESSAGEBODY",
      
      
      
      category : "TAGGED_CATEGORY",
     
 sound: "default.caf"
    }
    },  { useMasterKey: true }).then(function() {
      response.success("Push was sent successfully.")
  }, function(error) {
      response.error("Push failed to send with error: " + error.message);
  });
    
});

The code in iOS app to call this is:

 [PFCloud callFunctionInBackground:@"invitationNotification"
                               withParameters:@{@"theUserId": @"USERIDGOESHERE"}
                                        block:^(NSString *success, NSError *error) {
                if (!error) {
                    NSLog(@"Successful push");
                }
                else {
                    NSLog(@"error %@", error.description);
                }
            }];