Nextcloud : push notifications and emails not received

Hello everyone, I own Nextcloud version 20.0.7, I noticed that users no longer receive “Activity” notifications, only admin receives them. Does anyone have any feedback for me?
I keep trying to receive notifications, entering parameters as suggested by some users, but nothing to do. I tried to change the type to send email from the admin session, but nothing. Anyone have something to suggest?
‘activity_expire_days’ => 365,
‘wnd.logging.enable’ => true,

I would like to further point out that external sharing activities arrive via email, it seems that everything else is no longer going