Follow along with the video below to see how to install our site as a web app on your home screen.
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The APS Catalog has been deprecated and removed from all Plesk Obsidian versions. Applications already installed from the APS Catalog will continue working. However, Plesk will no longer provide support for APS applications.
Please be aware: with the Plesk Obsidian 18.0.78 release, the support for the ngx_pagespeed.so module will be deprecated and removed from the sw-nginx package.
Officially distupgrade to Debian 9 is not supported Dist-Upgrade Support
You can just install new server with Debian 9 and migrate your current server.
OH do you own the server? Well that's easy too - Get a temporary at Digital Ocean or something, where you can pay hourly. Migrate them off, wipe and reinstall your server, and the migrate them back over....
I mean... anything is going to cost you but having your server compromised for running old software/applications will cost you even more.
also i have installed plesk wit debian 9 on a new server must i migrate first in new server all my subscription from old server and must after start migration from old server?
yes i have new server with debian 9 after i need migrate this to my old server but here is no domains and subscriptions on the new server must i migrate without any subscription?