Yes, I got the same error message during install ""A server error occurred. Please try again later" but the installer continued running and going though the installation. I've tried the installer 2 times and always got the same. If you want to, I can give you access for you to look.
Zend_Db_Statement_Mysqli->_execute() in /var/www/html/virtual/consumidores.cl/www/library/Zend/Db/Statement.php at line 320
Zend_Db_Statement->execute() in /var/www/html/virtual/consumidores.cl/www/library/Zend/Db/Adapter/Abstract.php at line 468
Zend_Db_Adapter_Abstract->query() in /var/www/html/virtual/consumidores.cl/www/library/XenForo/Model/Phrase.php at line 992
XenForo_Model_Phrase->deletePhrasesForAddOn() in /var/www/html/virtual/consumidores.cl/www/library/XenForo/Model/Phrase.php at line 1022
XenForo_Model_Phrase->importPhrasesAddOnXml() in /var/www/html/virtual/consumidores.cl/www/library/XenForo/CacheRebuilder/ImportPhrase.php at line 33
XenForo_CacheRebuilder_ImportPhrase->rebuild() in /var/www/html/virtual/consumidores.cl/www/library/XenForo/ControllerHelper/CacheRebuild.php at line 26
XenForo_ControllerHelper_CacheRebuild->rebuildCache() in /var/www/html/virtual/consumidores.cl/www/library/XenForo/Install/Controller/Install.php at line 243
XenForo_Install_Controller_Install->actionStep2b() in /var/www/html/virtual/consumidores.cl/www/library/XenForo/FrontController.php at line 303
XenForo_FrontController->dispatch() in /var/www/html/virtual/consumidores.cl/www/library/XenForo/FrontController.php at line 132
XenForo_FrontController->run() in /var/www/html/virtual/consumidores.cl/www/install/index.php at line 17