API. Filter relations

What’s the current syntax?
I cant get mine to work
Please see screenshot
This How to Filter Results on Deeply Nested fields in Strapi did not help, nor did the first few google results

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Here’s the relation

Strapi version
v4.20.4

Hello,
check your rights on userOnline, and otherwise you can use qs library to help you write the syntax easily in js

check rights? where exactly?

My frontend is react. Seems like qs uses that other module system require('qs'). But my react frontend imports modules.
Right?
I dont mind trying the qs library. Just a slight inconvenience to build a dummy project just to generate queries

And no, your qs lib suggestion did not generate for me a working syntax

Here’s the relations field . It can be empty (null).
If that help in giving me indeas…

Could it be because the field is text, not numberic??

But when I tried with $eq, it also dont filter

check your rights on userOnline
Yes, I checked those 2 places. Nothing that I can see that would hinder my filter GET

users & permissions plugin > roles

check maybe public or authenticated

no you can use it with import

there’s also "@types/qs" if you’re using typescript