Hello @bgmsquad Happy you are here
Go to https://SERVER_URL:8090/managephp/editPHPConfigs choose the desired php version
; This directive allows you to disable certain functions.
; It receives a comma-delimited list of function names.
; http://php.net/disable-functions
disable_functions = pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare,
Remove pcntl_exec
pcntl_exec — Executes specified program in current process space. The pcntl_exec() function works exactly like the standard (unix-style) exec() function. It differs from the regular PHP exec() function in that the process calling the pcntl_exec() is replaced with the process that gets called. This is the ideal method for creating children. PHP: pcntl_exec - Manual
from the line and save the file.You have now enabled the exec function in the server for that php version.
NOTE: this is discouraged since its a security risk. It allows attackers to execute external programs.