I can't find my extension on GUI

apache log shows :

[Fri Jan 24 18:07:36.096625 2020] [php7:warn] [pid 156] [client 10.56.12.225:43722] PHP Warning:  require(/usr/share/ocsinventory-reports/ocsreports/extensions/lost+found/install.php): failed to open stream: No such file or directory in /usr/share/ocsinventory-reports/ocsreports/require/extensions/ExtensionManager.php on line 116, referer: https://ocs.thecodingmachine.com/ocsreports/index.php?function=extensionmanager

[Fri Jan 24 18:07:36.096667 2020] [php7:error] [pid 156] [client 10.56.12.225:43722] PHP Fatal error:  require(): Failed opening required '/usr/share/ocsinventory-reports/ocsreports/extensions/lost+found/install.php' (include_path='.:/opt/remi/php73/root/usr/share/pear:/opt/remi/php73/root/usr/share/php:/usr/share/pear:/usr/share/php') in /usr/share/ocsinventory-reports/ocsreports/require/extensions/ExtensionManager.php on line 116, referer: https://ocs.thecodingmachine.com/ocsreports/index.php?function=extensionmanager

I use a pvc in kubernetes thats why the lost+found file exists
Any help please ; Thanks in advance !!