TYPO3 Exception 1596980032¶
Below, the TYPO3 community may have provided additional information or solutions for this exception. However, these may or may not apply to your particular case. If you can provide more information, you should come back here and add your experience and solution steps to this issue once you have resolved it.
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InvalidArgumentException: A cache identifier was not set¶
When debuging the corresponding cache.definition might look like this:
'' => array('groups' => array('pages', 'all'))
This error can break the backend and frontend.
Before TYPO3 version 10 it was common that the variable
replaced automatically by the extension key of the corresponding
This has changed and the variable either has to be defined or the extension key automatically applied.
As the variable
$_EXTKEY was undefined, the array key for
the cache definition was empty.
The error was therefore caused by an incomplete extension-update.
Search in all extensions for usage of
$_EXTKEY in the file
If the variable is used but not defined in that file, define it in the beginning or replace it by the extension key.