These are common errors:
Solution: Most likely your antivirus is deleting that file. It is a false positive due the encryption of the file. Add Lineage II folder to the exclusion list of your antivirus and try to force update again.
Solution: Sometimes you can get this error if connection to server fails. Retry a few times and you should be able to log in without any further action. If not, try to reboot your computer.
Solution: It looks like you are missing some files. Try downloading the full game patched from here: http://bit.ly/l2reborn
Solution: Looks like you are using an outdated version of of the client patch. Do a FULL CHECK with the updater, and if it doesn’t resolve it, try deleting system folder and doing FULL CHECK again.