Troubles with Nfsen window: tabs not switching

[Hamrad99]

Hi all!
Some time ago I finished installing of Nfdump+Nfsen bundle on CentOS 7 with nginx. It took me a long time before I saw the graphs start to show up. But, unfortunately, I have encountered one problem that I cannot solve: when I try to open any tab in the Nfsen window (for example, Details, Alerts, etc.) or when I click on the graph image, I see that the page address in the browser address bar changes, but in fact I always see only the Home page. In this regard, I ask for help from the public: what could be the problem here?
Thank You!

[Hamrad99]

I was able to find a solution: I needed to look more closely at the logs:

2024/10/18 11:04:47 [error] 71930#71930: *35 FastCGI sent in stderr: "PHP message: PHP Warning: session_start(): open(/var/lib/php/session/sess_eh31rhjsbkce28ivqfulud60dv, O_RDWR) failed: Permission denied (13) in /opt/nfsen/html/pic.php on line 5; PHP message: PHP Warning: session_start(): Failed to read session data: files (path: /var/lib/php/session) in /opt/nfsen/html/pic.php on line 5" while reading response header from upstream, client: 10.31.0.85, server: 10.31.0.101, request: "GET /pic.php?profileswitch=./live&file=packets-month HTTP/1.1", upstream: "fastcgi://unix:/run/php-fpm/www.sock:", host: "10.31.0.101", referrer: "http://10.31.0.101/nfsen.php?tab=1"

When I looked at the permissions for the /var/lib/php/session/ folder, it turned out that the group:owner was specified as root:apache, although I do not use apache. I changed the owner and group to nginx:nginx and after restarting nfsen and nginx, this error went away. Now all the tabs on the /nfsen/nfsen.php page switch correctly, the data in them is displayed.