Fatal error after update

Need help.

I try to update piwik from my piwik site. After installation, I try to go to my piwik site and this is what I get:

Fatal error: Class Piwik\Plugins\Login\Auth contains 4 abstract methods and must therefore be declared abstract or implement the remaining methods (Piwik\Auth::getLogin, Piwik\Auth::getTokenAuthSecret, Piwik\Auth::setPassword, …) in /home/u32307/public_html/piwik/plugins/Login/Auth.php on line 250 Fatal error: Uncaught exception ‘Exception’ with message ‘The ui asset with ‘href’ = /home/u32307/public_html/piwik/libs/jquery/themes/base/jquery-ui.min.css is not readable’ in /home/u32307/public_html/piwik/core/AssetManager/UIAsset/OnDiskUIAsset.php:54 Stack trace: #0 /home/u32307/public_html/piwik/core/AssetManager/UIAssetMerger.php(111): Piwik\AssetManager\UIAsset\OnDiskUIAsset->validateFile() #1 /home/u32307/public_html/piwik/core/AssetManager/UIAssetMerger.php(99): Piwik\AssetManager\UIAssetMerger->concatenateAssets() #2 /home/u32307/public_html/piwik/core/AssetManager/UIAssetMerger/StylesheetUIAssetMerger.php(35): Piwik\AssetManager\UIAssetMerger->getConcatenatedAssets() #3 /home/u32307/public_html/piwik/core/AssetManager/UIAssetMerger.php(54): Piwik\AssetManager\UIAssetMerger\StylesheetUIAssetMerger->getMergedAssets() #4 /home/u32307/public_html/piwik/core/AssetManager.php(170): Piwik\AssetManager\UIAssetMerger->generateFile() #5 /home/u32307/public_html/piwik/core/View.php(283): Piwik\AssetManager->getMergedStyl in /home/u32307/public_html/piwik/core/AssetManager/UIAsset/OnDiskUIAsset.php on line 54

Then I logged in to my site with Filezilla, made backup from config/config.ini.php to my computer, downloaded latest version, and then I uploaded new files in binary mode, but it still gives me that fatal error. What to do?

Never mind. Now it’s working.