Last week, Lao Zuo configured LookingGlass in the server( here )The error message "proc_open() has been disabled" appears when you open the website display after the installation. It can be judged that the current WEB system does not support proc_open in PHP. We need to enable it in the current server.
The pagoda panel is currently used in the test server, so it is relatively simple to open and directly visualize the operation.

In the disabled function, you can see that proc_open functions are disabled and only need to be deleted. At the same time, you can also see that the proc_get_status function also needs to be disabled and deleted.
If we are not using the pagoda panel currently, similar to LNMP, we just need to go to php.ini to see if there is prohibition. If it is prohibited, remove the corresponding function and restart it.