Since now a change has been made on the ICQ servers, which has led to the inability of the main Adium client (apparently, this will continue for some time, since the Adium developers will wait for the improvement of the third-party libpurple library), I recommend using the Proteus client - from experience, it works well and looks nice.
UPD According to a user from yeleleo , at www.mediafire.com/?zn3m9w2ht9x is the old working version of Adium. Other things being equal, I would recommend it - in Proteus, messages in the log are sometimes lost, this is a very unpleasant bug.