Canon Generic Plus PCL6 Driver upload error

Hi there,
I am just setting up Univention UCS and its CUPS Printserver. I followed the KB-Posts as well as changes in the INI Files of the official Canon Printer driver.

After selecting the original INI file, i get this error which could be fixed by removing the PackageAware section.
Then, shortly another error box appeared (completely different text, same style - can’t replicate and have no screenshot).
After a further try, it again throws the error stated in the thread above. Reboot changed nothing.

Can anybody help or did anybody have the same problem? Or my I have missed some post fixing this issue?

Thanks and regards,