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.
Well it depends on your hoster but most of them grant you remote access to the system like ssh serial console, kvm console, remote-console, vnc ...... try to figgure out if your hoster allow this and log into your system and fix the key issue
Take into consider to tell the community which OS you have, perhaps someone has another Idea.
I assume you allready checked the firewall that ssh access is allowed. How it looks like when you try to connect to your system is something in your terminal window like a connection/error message?, maybe a screenshot would be helpfull