You should install the UBB.threads System Requirements Test Script and see if it detects any problems with your configuration; the error is reporting that the mysqli_pconnect function does not exist on your server, can you disable persistent connections in your config file and see if the error goes away?
the "PERSISTENT_DB_CONNECTION" line in /includes/config.inc.php should be set to '' (blank) for this test. Additionally, you can also install the mysqli_pconnect function to your server.
This is a bug because there is no mysqli_pconnect in the MySQLi extension. To fix this issue, replace line 31 in /ubb/libs/mysqli.inc.php:
Code
$this->dbh = mysqli_pconnect("p:" . $config['DATABASE_SERVER'], $config['DATABASE_USER'], $config['DATABASE_PASSWORD'], $config['DATABASE_NAME']) or die("Problem occured in connection");
with:
Code
$this->dbh = mysqli_connect("p:" . $config['DATABASE_SERVER'], $config['DATABASE_USER'], $config['DATABASE_PASSWORD'], $config['DATABASE_NAME']) or die("Problem occured in connection");
The "p:" will already open the persistent connection
