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These seem to be the errors
#5 [internal function]: Piwik\Session\SaveHandler\DbTable->write('1c9684654ac28 in /home/robertsd/analytics.robertsdesign.biz/libs/Zend/Db/Statement/Mysqli.php on line 77
#4 /home/robertsd/analytics.robertsdesign.biz/core/Session/SaveHandler/DbTable.php(145): Piwik\Session\SaveHandler\DbTable->query(‘INSERT INTO mat…’, Array)
#3 /home/robertsd/analytics.robertsdesign.biz/core/Session/SaveHandler/DbTable.php(113): Zend_Db_Adapter_Abstract->query(‘INSERT INTO mat…’, Array)
#2 /home/robertsd/analytics.robertsdesign.biz/libs/Zend/Db/Adapter/Abstract.php(478): Zend_Db_Adapter_Mysqli->prepare(‘INSERT INTO mat…’)
#1 /home/robertsd/analytics.robertsdesign.biz/libs/Zend/Db/Adapter/Mysqli.php(417): Zend_Db_Statement->__construct(Object(Piwik\Db\Adapter\Mysqli), ‘INSERT INTO mat…’)
#0 /home/robertsd/analytics.robertsdesign.biz/libs/Zend/Db/Statement.php(115): Zend_Db_Statement_Mysqli->_prepare(‘INSERT INTO mat…’)

Hi,

This is just the stack trace. The actual error message is the line before or after what you posted.

#5 [internal function]: Piwik\Session\SaveHandler\DbTable->write('c05232cd0bc73 in /home/robertsd/analytics.robertsdesign.biz/libs/Zend/Db/Statement/Mysqli.php on line 77

That’s just the first line of the stack trace you posted before.