Clear Caches¶
You should also clear all caches when upgrading.
Go to “Maintenance” and click “Flush”:

The option “Flush” in the Install Tool.
Additionally, after an upgrade to a new major version, you should also delete
the other temporary files, which TYPO3 saves in typo3temp/
. In the
Install Tool go to “Clean up” to do so.

The option “Remove temporary assets” in the Install Tool.