QThread::start: Failed to create thread (The access code is invalid.) How to fix?

Question

Qt

I wrote a qt program that downloads VKontakte posts and pictures for them.
Pictures are loaded like this:

connect(netReply, SIGNAL(readChannelFinished()), &loop, SLOT(quit()));

After the program starts to take up ~ 150 mb and creates 403 threads, writes
QThread:: start: Failed to create thread (The access code is incorrect.)
tried

connect(netReply, SIGNAL(readChannelFinished()), &loop, SLOT(quit()), Qt::DirectConnection);

If I understand correctly, then fewer threads should be created.
but after running the program, the same thing happens.
Maybe somewhere there is a limit on running ~ 400 threads or on the size of the program in memory 150 megabytes.
How to remove limits or how to reduce the number of threads?

Answer 1

Removed QNetworkAccessManager *manager and QNetworkReply *netReply and reuse them.

Answer 2

What's the point of creating more threads than can actually run in parallel?
In my opinion, the OS itself monitors the number, but it should be more than 400.
Simplified code for creating and deleting a stream in the studio.

Answer 3

masonry.desandro.com
Use this.

Answer 4

You apparently wrote the wrong classes for them. Do col-xs-4 for the main 3's

Answer 5

jsfiddle.net/LucasKane/ge2swm5v