Update OCS-Server from 2.6 to 2.8

Hey Guys,

i have a problem to update our OCS-Server from 2.6 to 2.8. The "Mailsystem" (/var/spool/mail/root) the message that two logrotats a failed: /etc/cron.daily/logrotate:

1. error: skipping "/var/log/ocsinventory-server/activity.log" because parent directory has insecure permissions (It's world writable or writable by group which is not "root") Set "su" directive in config file to tell logrotate which user/group should be used for rotation.

2. Subject: Cron <root@idoit> /usr/local/bin/idoit-console search-index > /tmp/idoit-search-index.log

I have tried to change the group and user for the logrotat. But this was not the solution. In every directory up to /var and also the activity.log is user and group root.

Also a php module failed:
Failed loading /usr/lib64/php/modules/ixed.7.2.lin:  /usr/lib64/php/modules/ixed.7.2.lin: undefined symbol: _zval_ptr_dtor
If I log on the web interface i get only old informations from the database but nothing actuality information like devices that were connected today or changes.