Operating sytem is debian 8.9. Plesk Onyx Version 17.5.3.
Log: /var/log/plesk-php70-fpm
[14-Sep-2017 04:54:13] ERROR: No pool defined. at least one pool section must b$
[14-Sep-2017 04:54:13] ERROR: failed to post process the configuration
[14-Sep-2017 04:54:13] ERROR: FPM initialization failed
[14-Sep-2017 04:58:51] ERROR: No pool defined. at least one pool section must b$
[14-Sep-2017 04:58:51] ERROR: failed to post process the configuration
[14-Sep-2017 04:58:51] ERROR: FPM initialization failed
[14-Sep-2017 05:07:37] ERROR: No pool defined. at least one pool section must b$
[14-Sep-2017 05:07:37] ERROR: failed to post process the configuration
[14-Sep-2017 05:07:37] ERROR: FPM initialization failed
[14-Sep-2017 17:50:39] ERROR: No pool defined. at least one pool section must b$
[14-Sep-2017 17:50:39] ERROR: failed to post process the configuration
[14-Sep-2017 17:50:39] ERROR: FPM initialization failed