TYPO3 Exception 1481380393¶
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Might happen after upgrading to TYPO3 8.7 LTS or above.
Fix: Check the syntax in your FlexForms when using
<displayCond>. See the
displayCond in the TCA Reference <t3tca:columns-properties-displaycond>:
<displayCond> <AND> <numIndex>FIELD:switchableControllerActions:!=:Event->list</numIndex> </AND> </displayCond>
<displayCond> FIELD:switchableControllerActions:!=:Event->list </displayCond>