Enabling Imagick For Alt-PHP## Fails With Error 'WARN:imagick skipped as conflicting'

Symptoms

When trying to enable the Imagick PHP extension for an Alt PHP version in CloudLinux, either from the "Select PHP Version" app in cPanel or using the command line, you encounter an error similar to the following.

WARN:imagick skipped as conflicting

Description 

The error usually means that there is at least one conflicting PHP extension already enabled for the user, such as Gmagick.

Workaround

1. Access the server's command line as the cPanel user via SSH or "Terminal" in cPanel.
2. Disable the conflicting extension.

   /usr/bin/selectorctl --disable-user-extensions=$extension --version=#.#

   Please note that "$extension" and "#.#" must be replaced with the conflicting extension name and the PHP version.
3. Enable the imagick extension.

   /usr/bin/selectorctl --enable-user-extensions=imagick --version=#.#

   Please note that "#.#" must be replaced with the PHP version.