WordPress 5.7 compatibility

It really looks like there’s an application on your server that blocked the scanner.
Between those two lines, there’s 1 minute 48s, and that’s not normal:

24-Mar-21 11:13:51 DEBUG Processus exécuté en 0.1 secondes et a utilisé 217,80 Mo de mémoire (mémoire additionnelle pour NinjaScanner : 0,00 Mo).
24-Mar-21 11:15:39 INFO Traitement de l’étape 2/14

And then it stopped (or was blocked) without error in the log after step 2.

Do you have a reverse proxy, cache or CDN? Or another security application or security rules are the HTTP server level?

• This reply was modified 1 year, 12 months ago by nintechnet.

That’s what I thought: your host has a security protection that is very unusual and annoying. They killed the scanner’s process for whatever reason, and your browser kept trying to connect to the site many times because it didn’t receive a response from the scanner over AJAX. And then, they blocked your IP 🙁
You can contact the support if you want to cancel/refund your license or use it on another site.

You can lower the connection requests sent by your browsers via AJAX to your site.By default, it sends 1 request every 1.5 second.
Open your wp-config.php and add those lines:

// NinjaScanner AJAX interval (milliseconds):
if (! defined( 'NSCAN_MILLISECONDS' ) ) {
   define( 'NSCAN_MILLISECONDS', 3000 ); // 3 seconds
}

This will change it to 1 request every 3 seconds (3000 milliseconds). You can change this value to whatever you want but make sure to not increase it too much. I wouldn’t personally increase it more than 5 seconds.

Note that this applies to manual scans only. Scheduled scans don’t send those AJAX requests as they are only use to update the status of the page while you are logged in.

• This reply was modified 1 year, 12 months ago by nintechnet.

The plugin will send around 14 requests during the whole scan, that’s not a lot. You cannot control that, but you can change the fork method: NinjaScanner > Settings > Advanced Users Settings > Scanning process” and choose WP CRON for instance.