You've fatal errors on your site, which will affect all other code. Suppressing an error does not make it go away or prevent it from affecting other parts of your site.
Code:
500 - JDatabaseMySQLi::query: 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-120' at line 1 SQL=-120
The above is coming from "Visiteurs" (mod_jts_counterstats - JTS CounterStats) and have disabled it for you. The above error is now resolved.
Code:
500 - JDatabaseMySQLi::query: 1146 - Table 'francedebd1.jnew_mypms' doesn't exist SQL=SELECT count(id) FROM jnew_mypms WHERE username='krileon' AND readstate=0
The above is coming from CB Login Module where you've set "Private Messaging System", but don't have any supported PMS extensions installed. I've set this back to default of no installed PMS as well as disabled Private Message System plugin in CB. The above error is now resolved.
Fixing both of the above did not resolve the issue however. It turns out you had an early build of 1.9 that had a few bugs that we quickly fixed and re-released. I've installed 1.9 over top your existing and its upgraded you to latest package. I've confirmed issue is now resolved. Please also confirm is working as expected.