The update server could not be reached since 7 day check for new updates

Hello,
I am receiving a notification: The update server could not be reached since 7 day check for new updates.
Version Nextcloud: 21.0.4

I tried to fix according to this documentation -Nextcloud, problems with auto updater - #4 by devnull
The notification disappeared, but several days passed and the installation of the new version did not offer.
This is fine?