TYPO3 Exception 1482394401
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Missing "type" in TCA of field
Using form finishers
Enabling in the Form plugin the "Override finisher settings" option may display this error for wrongly configured form finishers.
Solution
Comment out one finisher at a time in the form definition file (*.form.yaml) to find the culprit.
Using TCEforms FlexForm
The error message only gives an example table name and table field, because due to some migration to real names are not used in this error message. So you have to do some guesswork from which extension causes this error. Check the FlexForm file FlexForm_ds.xml (or another name) of the extension if there are TCEforms entries. In the child pair config a type must have been defined.
Example:
<config>
<form_type>user</form_type>
<userFunc><![CDATA[EXT:myextension/lib/class.tx_myextension_tceFunc.php:&tx_myextension_tceFunc->getCheckbox]]></userFunc>
<checked>0</checked>
</config>
You must use the type instead:
<type>user</type>