Position not working

Your CSS code would position the block outside visible screen.
You can try sticky ad with this code:

position: fixed; z-index: 9995; top: 100px; left: 0px;

If you are using responsive AdSense code make sure you defide ad size.

Please enable remote debugging so we can check your settings:
https://www.ads-software.com/support/topic/ad-inserter-support-before-you-ask-for-help/

Hi Spacetime, thanks for your reply.

Suddenly my code is working! surprisingly because before it did not work (I did not insert the code you suggested).
Now I can see the ads – but I need to set a category. Should I put a URL or a category name?

Another weird thing, as said I did not set a category yet, but all the pages that the ads are showing on – are those category pages. How can it be?

I have enabled the remote debugging.
There are the details:
This is the target pages (this is one for example): shorturl.at/lqKMW
The ad blocks I’m using to set this up are block1 + block2

Thanks a lot!

All 3 blocks are inserted according to the settings.

What category do you mean?

block 3 does not have the same settings: https://prntscr.com/or63s5

The desired category to set the ads is this one: coloring pages online
I would like to know how to set this the right way please.

And suddenly again from a different desktop – I no longer see the ads although I did not change a thing.

You can limit insertion by post category using black/white lists:
https://adinserter.pro/documentation/black-and-white-lists

You can visualize and debug block insertions using debugging functions:
https://adinserter.pro/documentation/debugging

If the code is inserted and you don’t see ads then very likely the ad code does not display anything – use debugging function Label blocks:
https://adinserter.pro/documentation/troubleshooting#ads-not-displayed

Thank you, I appreciate your help ??