There no 'fix', Because there is NO problem that can be duplicated...
Just because you don't have the knowledge or have something setup wrong to get it working doesn't make it a 'bug'.
PHP Version Switcher and PHP-FPM Selector (Paid Version of CWP) work perfectly fine on all of the AL9 servers on our network.
Insulting @overseer or any of us that come on here and help users, you are the reason we have stopped bothering helping...
Open a support ticket with CWP, because I doubt your going to get anymore help here...