I forget, the part WEB of host discovery is blank : 

Hi @yohann ,

Sorry but if you remove the Centreon Auto Discovery module, you loose configuration.

You need to reinstall the Monitoring Connectors (ex Plugin PAcks) to reinstall discovery rules.

For the blank page to Host discovery menu, do you have errors in /var/log/php-fpm/centreon-error.log file?

Hi Laurent, thank you for your answer,

Ok it’s normal but which monitoring connector in search ?

And to blank page issue, in  /var/log/php-fpm/centreon-error.log :

Thank you :-)

Hi laurent, I’m sorry, I’m don’t understood that the rule disovery is deploy with for the connector desire for example “Linux SNMP” who deploy so the template of “LInux SNMP” and too the discovery rule’s.

I confirm that it’s works : 

Thank you again.