Cannot send headers
Upgrading to full version. Cannot send headers on step 4.
I purchased the full version, and I'm upgrading from the lite version. On step 4, I ran into this error.
Code:
Upgrading to Full
Step 4
Updating data in table: vw_link
An exception occurred: Cannot send headers; headers already sent in [path]/vault/core/view/cp/progress/vw.php, line 548 in [path]/library/Zend/Controller/Response/Abstract.php on line 321
#0: Zend_Controller_Response_Abstract->canSendHeaders() in [path]/library/Zend/Controller/Response/Abstract.php at line 115
#1: Zend_Controller_Response_Abstract->setHeader() in [path]/library/XenForo/ViewRenderer/Abstract.php at line 63
#2: XenForo_ViewRenderer_Abstract->__construct() in [path]/library/XenForo/ViewRenderer/HtmlPublic.php at line 18
#3: XenForo_ViewRenderer_HtmlPublic->__construct() in [path]/library/vw/XenForo/ViewPublic.php at line 128
#4: vw_XenForo_ViewPublic::getInstance() in [path]/vault/core/view/global/xf.php at line 140
#5: vw_Global_View_XF->add_css() in [path]/vault/core/view/bbcode/vw.php at line 36
#6: vw_BBCode_View->on() in [path]/library/vw/XenForo/BbCode/Parser.php at line 685
#7: vw_XenForo_BbCode_Parser->vwGetWikiTagDefinitions() in [path]/library/vw/XenForo/BbCode/Parser.php at line 131
#8: vw_XenForo_BbCode_Parser->vwAppendWikiTags() in [path]/vault/core/model/parser/xf.php at line 151
#9: vw_Parser_Model_XF->create_default() in [path]/vault/core/model/parser/xf.php at line 45
#10: vw_Parser_Model_XF->create() in [path]/vault/core/controller/dm/page/vw.php at line 1106
#11: vw_DM_Page_Controller->process_links() in [path]/vault/core/controller/dm/page/vw.php at line 858
#12: vw_DM_Page_Controller->process_revision() in [path]/vault/core/controller/dm/page/vw.php at line 748
#13: vw_DM_Page_Controller->pre_save() in [path]/library/vw/XenForo/DataWriter.php at line 512
#14: vw_XenForo_DataWriter->_preSave() in [path]/library/XenForo/DataWriter.php at line 1460
#15: XenForo_DataWriter->preSave() in [path]/library/vw/XenForo/DataWriter.php at line 192
#16: vw_XenForo_DataWriter->preSaveWithReturn() in [path]/vault/core/controller/dm/xf.php at line 402
#17: vw_DM_Controller_XF->pre_save() in [path]/library/vw/XenForo/DataWriter.php at line 187
#18: vw_XenForo_DataWriter->preSave() in [path]/library/XenForo/DataWriter.php at line 1399
#19: XenForo_DataWriter->save() in [path]/vault/core/controller/dm/xf.php at line 436
#20: vw_DM_Controller_XF->save() in [path]/vault/install/lib/upgradepath/steps/lite/vw.php at line 272
#21: vw_Install_UpgradePath_Steps_Lite_Controller->{closure}() in [path]/vault/core/controller/progress/steps/vw.php at line 83
#22: vw_Progress_Steps_Controller->call() in [path]/vault/core/controller/progress/steps/vw.php at line 53
#23: vw_Progress_Steps_Controller->execute() in [path]/vault/install/lib/upgradepath/vw.php at line 69
#24: vw_Install_UpgradePath_Controller->exec_script() in [path]/vault/core/controller/progress/vw.php at line 74
#25: vw_Progress_Controller->execute() in [path]/vault/core/controller/cp/progress/vw.php at line 37
#26: vw_CP_Progress_Controller->process() in [path]/vault/core/controller/cp/install/vw.php at line 436
#27: vw_CP_Install_Controller->upgrade() in [path]/vault/core/controller/cp/install/vw.php at line 56
#28: vw_CP_Install_Controller->execute() in [path]/library/vw/XenForo/ControllerAdmin/Wiki.php at line 125
#29: vw_XenForo_ControllerAdmin_Wiki->actionIndex() in [path]/library/vw/XenForo/ControllerAdmin/Wiki.php at line 182
#30: vw_XenForo_ControllerAdmin_Wiki->actionUpgrade() in [path]/library/XenForo/FrontController.php at line 351
#31: XenForo_FrontController->dispatch() in [path]/library/XenForo/FrontController.php at line 134
#32: XenForo_FrontController->run() in [path]/admin.php at line 13