Invalid URL after update

Hi,
I have recently updated Joomla and the plugin "Components anywhere".
I currently have Joomla 3.10.5 and System - Regular Labs - Components Anywhere 4.9.0.
After the update the plugin no longer works and keeps showing me the message:
<!-- Components Anywhere Message: The component cannot be placed because an invalid URL is given or the page timed out. -->

I carried out many many tests by modifying the url (which can be reached: trent.operauni.tn.it/camera-singola ) but in the homepage ( trent.operauni.tn.it/ ) I don't see the articles.

I report below all the attempts i made:
- The server has a very very fast response time (I recently changed the server and bought a very powerful one);
- I tried to write the shortcode in multiple methods but the result was never seen (ex: {component url="camera-singola"};{component camera-singola};...);
- I tried to change the plugin configurations;
- I tried to disable ALL plugins on the site except this one;
- I tried to change the sort order of the plugin;
- Uninstalled and reinstalled the plugin

Before updating the plugin everything was working fine, I assume there is a bug. how can i solve?

Thanks,
Moreno

The plugin Page Cache it is not active.
I use your plugin "System - Regular Labs - Cache Cleaner"

I tried to install the plugin on another site on the same server and it doesn't work 🙁 so it's definitely a server problem.
But I don't know where to put my hands to solve the problem.
It is probably a firewall problem but it is difficult for me to understand why it is not working.

do you still confirm that I cannot reach and view the link you sent me earlier (/camera-singola?lang=it-IT&tmpl=component&rendercomponent=1)?

Thank you very much for your help!