Why don't sessions work in KCFinder?

Question

CKFinder

Hello!
Question in the following: is ckeditor and kcfinder. Sobsna, I press the selection button on the server, then a message is displayed stating that there are no rights. There is a domain - example.com/path, session_id() gives i2ib1eltn1ng44qj01v7mbisg2, which does not match PHPSESSID, but when you click on the select button on the server, session_id() gives a completely different value, but the same value as PHPSESSID. yii2 framework, all session settings by default. Data is filled from the application in the session
Yii::$app->session->set(
'KCFINDER',
[
'disabled' => false,
]
)
But is it not visible in kcfinder? Question: what's wrong?
Thanks in advance for your help