How to fix Internal Server Error when trying to open ISPConfig?

Question

Nginx

Hello.
ISPConfig worked great under Nginx on CentOS 6.8.
After updating ISPConfig, the panel began to crash with Internal Server Error.
Recommendations for Apache are given around, but for Nginx a solution could not be found.
error.log:
[error] 1580#0: *147952 FastCGI sent in stderr: "PHP message: PHP Fatal error: Allowed memory size of 262144 bytes exhausted (tried to allocate 7168 bytes) in /usr/local/ispconfig/interface/ lib/classes/db_mysql.inc.php on line 754" while reading response header from upstream, client: 192.168.0.37, server: _, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/ var/lib/php5-fpm/ispconfig.sock:", host: "192.168.0.38:8080"

Answer 1

Cured by restarting the update process.