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.
Reinstalling apache and its modules shouldn't be problem. Have you doublechecked that there aren't any outdated modules installed/active?
You should use proxy_fcgi and proxy from the same Debian repository / version as apache.
I've removed the package via
aptitude purge libapache2-mod-proxy-psa
I didn't get any dependency warnings but keep this in mind and make sure that no other (used) packages will be removed.
Had the same isssue with the following setup:
Plesk Onyx Version 17.8.8
Debian 9.3
Apache/2.4.25
These steps solved the problem on my system:
Purging an outdated libapache2-mod-proxy-psa (initially installed while using Debian 8.x)
Disabling the Apache modules proxy_fcgi and proxy...