upgrade error

I am facing this issue for the past 12 hours but it has not been fixed. I purchased the license. please help me to upgrade my site and give me the detailed solution of all problems and errors. Also, let me know how much time it will take to upgrade the version and where I can see the progress...

XenForo 2.1.0 is now available through upgrade check. I clicked Upgrade now to attempt a 2.1 click update. However, I saw the following message. "The following issues have been identified when a one-click upgrade is possible: The files are not writable." What files and folders should I change...

While attempting to upgrade to 1.5.11 from 1.5.4 I'm seeing the following server error: Server Error Mysqli statement execute error : Duplicate entry '0-ajaxProgress' for key 'definition_style_id_property_name' Zend_Db_Statement_Mysqli->_execute() in Zend/Db/Statement.php at line 297...

Attempting to move from XenForo 1.3.4 to 1.5 to get the security updates. I'm trying to run the upgrade script and I'm getting back "An unexpected error occurred. Please try again later." I've tracked the call down to this line in the file - XenForo_Application::initialize($fileDir ...

Error upgrading 1.5.6 -> 1.5.7 Using file xenforo_1.5.7_759413274E_upgrade.zip URL: install/index.php?upgrade/run-deferred Error message: Fatal error: include() [<a href='function.include'>function.include</a>]: Cannot redeclare class xenforo_deferred_importmasterdata in...

Fresh installation of 1.5.1 with few addons. after upgrade I got this server error: Server Error Log Error Info ErrorException: Fatal Error: Class 'XenForo_Dependencies_Public' not found - library/XenForo/CssOutput.php:623 Generated By: Unknown Account, 15 minutes ago Stack Trace #0 [internal...