[TYPO3-mvc] Re: Create predefined fe_groups when activating extension

[David Effendi]

Hey Quan,

you should probably take a look into the blog_example extension or the sjr_offers extension.

There you'll find examples for all the stuff you might need.

This error might appear because you haven't cleared the system cache.
If this error still appears just uninstall and reinstall your extension.

I had to do this quite some times already when working with TYPO3 7.

cheers
David