Joomla 4.0.2 へのアップグレード時に AJAX エラーメッセージが出て失敗する

From Joomla! Documentation

This page is a translated version of the page J4.x:Upgrades to Joomla 4.0.2 fail with an AJAX error message and the translation is 67% complete.
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In the process of clearing up issues discovered with the first major release of Joomla 4.0.0 a patch was merged which has broken future updates from Joomla 4.0.1 to 4.0.2 Update packages.


Ajax error 401.png


General Information

This pertains only to Joomla! version(s): 4.0.1


A bug introduced in the updater of Joomla 4.0.1


  • Please wait for 4.0.2
  • When you are already on 4.0.1 you will (once published) get an update of the Joomla Update Component that you have to install first and than you can go to 4.0.2
  • Updates from 3.10.x or 4.0.0 to 4.0.2 will not be affected.