slabbi wrote: Please check if you have updated _all_ uddeIM components:
com_uddeim
mod_uddeim
mod_uddeim_mailbox
mod_uddeim_statistics
plug_uddeim_contentlink
plug_uddeim_hooks
plug_uddeim_searchbot
cb_plug_pms_uddeim
cb_plug_pms_uddeim_blocking
cb_plug_pms_uddeim_inbox
cb_plug_pms_uddeim_profilelink
When only one of these has not been updated you will get a conflict while loading the libraries.
Please check if Kunena uses a copy(!) of uddeIM API (or even worse, loads the libraries itself). When it uses a copy of uddeim.api.php so overwrite the file with the newer one from the uddeIM package.