[Solved] Blog: blank page if the category has subcategories

Hi.
I created a module to show all my articles, regardless of the subcategory of the article (there are four subcategories).
Then I call this module within an article.
Blank page.
But if I use the same method to show only one subcategory, it works perfectly.
The attached image shows my configuration.

I also tried to change some settings (Child Category Articles Yes/No, or Category Depth 0-3), but I never won!
What can I do?

Hi
Please enable the php error report on maximum in your website config and tell me if you can see an error message in the blank page, if yes, please paste it
CEd

Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 528384 bytes) in /var/www/vhosts/claudioromeo.it/httpdocs/libraries/src/Log/LogEntry.php on line 116

Thank you.

this looks like an infinite loop
this can happen if you are doing something like that : calling a blog category from an article, which is in the category. The article will call it in a infinite loop

please check if you are in a such case

No.
The category of the article has ID 13 (Istituzionali). The category called by the module has ID 9 (Blog). See the image.

No Blog's subcategory matches the category of the article.

Could I have done something wrong?

I've got the point!
It really was a recursive matter, in a smartly hidden way.
Now I'm going to solve the problem.
Thank you for your suggestion.