notice - Contribute
First of all: Please check, if you have configured your controller in ext_localconf.php
If the problem still comes up:
- Have a look at this, if you work with switchableControllerActions.
- Maybe you have changed your content element from another plugin to your new extbase plugin. In that case it may be that the previous plugin works with FlexForms (pi_flexform). Extbase will read these FlexForm-Configurations regardless, if your plugin needs them or not. So please delete current content element, create a new one and choose your plugin OR clear content of col pi_flexform in database of this content element.
- If you don't want to add the missing controller to ext_localconf.php you have the posibility to add following into your TypoScript:
plugin.your_extension.mvc.callDefaultActionIfActionCantBeResolved = 1
see [ERROR: Cannot get content for issue "31322"]