You are connected as 'root' with no password, which corresponds to the default MySQL privileged account. Your MySQL server is running with this default, is open to intrusion, and you really should fix this security hole by setting a password for user 'root'.
Warning in ./libraries/dbi/DBIMysqli.class.php#261
Error while sending QUERY packet. PID=989153
Backtrace
./libraries/dbi/DBIMysqli.class.php#261: mysqli_query(
object,
string 'SELECT COUNT(*) FROM ( SELECT DISTINCT SUBSTRING_INDEX(SCHEMA_NAME, \'_\', 1) DB_first_level FROM INFORMATION_SCHEMA.SCHEMATA WHERE TRUE ) t ',
integer 0,
)
./libraries/DatabaseInterface.class.php#246: PMA_DBI_Mysqli->realQuery(
string 'SELECT COUNT(*) FROM ( SELECT DISTINCT SUBSTRING_INDEX(SCHEMA_NAME, \'_\', 1) DB_first_level FROM INFORMATION_SCHEMA.SCHEMATA WHERE TRUE ) t ',
object,
integer 1,
)
./libraries/DatabaseInterface.class.php#1946: PMA_DatabaseInterface->tryQuery(
string 'SELECT COUNT(*) FROM ( SELECT DISTINCT SUBSTRING_INDEX(SCHEMA_NAME, \'_\', 1) DB_first_level FROM INFORMATION_SCHEMA.SCHEMATA WHERE TRUE ) t ',
NULL,
integer 1,
boolean false,
)
./libraries/navigation/Nodes/Node.class.php#611: PMA_DatabaseInterface->fetchValue(string 'SELECT COUNT(*) FROM ( SELECT DISTINCT SUBSTRING_INDEX(SCHEMA_NAME, \'_\', 1) DB_first_level FROM INFORMATION_SCHEMA.SCHEMATA WHERE TRUE ) t ')
./libraries/navigation/NavigationTree.class.php#1314: Node->getPresence()
./libraries/navigation/NavigationTree.class.php#834: PMA_NavigationTree->_fastFilterHtml(object)
./libraries/navigation/Navigation.class.php#44: PMA_NavigationTree->renderState()
./libraries/Header.class.php#433: PMA_Navigation->getDisplay()
./libraries/Response.class.php#263: PMA_Header->getDisplay()
./libraries/Response.class.php#276: PMA_Response->_getDisplay()
./libraries/Response.class.php#397: PMA_Response->_htmlResponse()
PMA_Response::response()
