Hi ​@Alvaro which version of Centreon do you use?

Can you check in /var/log/php-fpm/centreon-errors.log file?

My version is Centreon 24.10.6

I dont use php-fpm, i have apache configured:
The error log of apache has this configured:
rFri Apr 04 10:09:49.053089 2025] 2proxy_fcgi:error] opid 1262077:tid 1262121] 2client 192.168.50.74:65108] AH01071: Got error 'PHP message: g2025-04-04T10:09:49+0200] 0CRITICAL] Uncaught Exception: Error while executing the prepared query: SQLSTATET42000]: Syntax error or access violation: 1055 Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'centreon_storage.i.host_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by {"exception":"nobject] (CentreonDbException(code: 11): Error while executing the prepared query: SQLSTATET42000]: Syntax error or access violation: 1055 Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'centreon_storage.i.host_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by at /usr/share/centreon/www/class/centreonDB.class.php:291)\\n)previous exception] oobject] (PDOException(code: 42000): SQLSTATET42000]: Syntax error or access violation: 1055 Expression #2 of SELECT list is no...', referer: https://192.168.50.39:11443/centreon/main.get.php?p=103
rFri Apr 04 10:13:49.345679 2025] 2proxy_fcgi:error] opid 1262077:tid 1262105] 0client 192.168.50.74:65487] AH01071: Got error 'PHP message: g2025-04-04T10:13:49+0200] 0CRITICAL] Uncaught Exception: Error while executing the prepared query: SQLSTATET42000]: Syntax error or access violation: 1055 Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'centreon_storage.i.host_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by {"exception":"nobject] (CentreonDbException(code: 11): Error while executing the prepared query: SQLSTATET42000]: Syntax error or access violation: 1055 Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'centreon_storage.i.host_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by at /usr/share/centreon/www/class/centreonDB.class.php:291)\\n)previous exception] oobject] (PDOException(code: 42000): SQLSTATET42000]: Syntax error or access violation: 1055 Expression #2 of SELECT list is no...', referer: https://192.168.50.39:11443/centreon/main.get.php?p=103
rFri Apr 04 10:13:49.349298 2025] 2proxy_fcgi:error] opid 1262077:tid 1262117] 1client 192.168.50.74:65503] AH01071: Got error 'PHP message: g2025-04-04T10:13:49+0200] 0CRITICAL] Uncaught Exception: Error while executing the prepared query: SQLSTATET42000]: Syntax error or access violation: 1055 Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'centreon_storage.i.host_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by {"exception":"nobject] (CentreonDbException(code: 11): Error while executing the prepared query: SQLSTATET42000]: Syntax error or access violation: 1055 Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'centreon_storage.i.host_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by at /usr/share/centreon/www/class/centreonDB.class.php:291)\\n)previous exception] oobject] (PDOException(code: 42000): SQLSTATET42000]: Syntax error or access violation: 1055 Expression #2 of SELECT list is no...', referer: https://192.168.50.39:11443/centreon/main.get.php?p=103
root@Centreon:/var/log/centreon# tail -n 100 /var/log/apache2/error.log

​@Laurent Solved!!
To solve it (Not permanent, only in session)

SET GLOBAL sql_mode = 'STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION';


(Permanent)I add this configuration to my.cnf and the widgets pop up, the logs error solved too: