FTP Manager not working.

Hi,

Yesterday i have installed new fresh Sentora on Centos 7. on fresh installation everything was working fine including FTP manager. 
after that i update PHP 5.4 to 7.3, but after this upgrade FTP manager stopped working, showing an empty page. just empty page no any error.
 
I am very new, first time trying to install VPS so i dont have much knowledge to debug things. even dont know where and how can i find modules directory.
please help if anyone can.

Thanks in advance.