Im using ubuntu server and after one apt dist-upgrade my nginx stop working! I got the error:

502 Bad Gateway

nginx/1.24.0 (Ubuntu)

1. So, i I started to investigate and open the var/log/nginx

connect() to unix:/var/run/php/php-fpm.sock failed (2: No such file or directory) while connecting to upstream

2. okay. thats a PHP problem – not nginx. So, i start to verify and start “php” on the shell, and the return is:

php: symbol lookup error: /lib/x86_64-linux-gnu/libxml2.so.2: undefined symbol: ucnv_close_74

And ends the process.

3. I have tried to reinstall the libxml2 and PHP with apt-get –reinstall but the error continues…