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.
Hmmm, I suspect it is a corrupt template in PLESK, but only repair or overwrite that file will help you. If it is still working the environment (and is only a duplicate in template) then I suggest to leave it like that until next update.
Also you can try to do an autoinstaller and install any small component. Can this force to get microupdates again and fix it. It is a chance.