Automatic Updates are often useful and necessary to keep systems up to date. For this purpose, software packages are automatically installed and updated on servers. This also applies to the Imunify360 security package on Plesk Servers.
How can I determine whether I am affected?
The problem is noticed by error messages in the error log, or at longer script runtimes when the calls are terminated with a 503 error message, or an internel server error.
The fastest way to see it is to use webmail, which uses Php version 7.3 for Plesk servers. Directly after logging in you will get an internal server error which you can skip by calling it several times.
How to solve the problem?
Unfortunately it was not possible to solve the problem by e.g. restoring an older version. Even after uninstalling imunify360 the php Error ...has not been eliminated.
But the solution is relatively simple.
Step 1: Uninstall Imunify360
With the following command the Imunify360 Deploy Script can be downloaded and imunify360 uninstalled.
bash i360deploy.sh -uninstall
The process takes a while, because all Domains are processed here. With 100 domains about 15 minutes.
Step 2: Install Imunify360
If imunify360 is completely disabled it can be easily reinstalled with the following command:
Afterwards, the license key must be activated again in the Plesk menu. The php error messages will then disappear again.