Enable - Proc_open
Login into your cPanel account and go to " MultiPHP INI Editor", the page should look like the one below. Make sure to click on the "Editor Mode" tab.
Then, click the domain you want to enable this on in the dropdown called "Select A Location"
Then add the below line to the area above, make sure to put it BELOW anything already within the file:
disable_functions = proc_open
Once added, click SAVE. proc_open Should then work after roughly 2 hours.