First of all, I'm sorry for all the problems that I have...   . Yesterday I installed the new version of icy phoenix and the new problem that I detected is that I can't acces to the Knowledge Base, when I try to do it, appears this error message:

The knowledge base apparently doesn't exist like it used to for the latest version, and is now a MOD that you have to download from GitHub and install from the ACP.

For example this file in your error: /includes/functions_kb.php

Is now /plugins/kb/includes/functions_kb.php

And going by your error, you appear to still have some of the "older version" files that are not compatible with the new version. ?

KB Mod is now only available as plugin.
Did you install the KB mod plugin?
https://github.com/MightyGorgon/icy_phoenix_plugins

Remember: It is possible to change a normal forum (in ACP), that it looks like KB-Mod.

EDIT: Mort was quicker than me  

Thanks a lot! it works yet!