Getting this error after logging out with a "normal" account

[c0n574nz0]

Ok, so here is the problem. I was testing the integration with my PHPBB2 forum and copppermine 1.4.2. Everything seemed to be fine by integrating, when i tried to login and logout with my administrator account. I used a "normal" account and i got 2 errors after logging out:

the first time i saw:
invalid_session

and the error that i'm currently getting is:

phpBB : Critical Error

Could not get theme data for themes_id [2]

forum url: www.lavignefan.com/phpBB2
gallery: www.lavignefan.com/gallery
Integration config: : ../phpBB2/ / Use post-based groups?: 0 / Cookie prefix: phpbb2mysql - phpBB prior 2.0.18
Test account:user: xxALavigneFanxx / pass: alavigne
integration is: on

please i hope someone can help me.Thanks in advice.

[Nibbler]

That's not related to Coppermine.