Why can't I access my extensions' settings on the frontend? - typo3

Question

Trying to access a few settings that I've created in my constants.txt file. It looks like this:
plugin.tx_my_ext {
settings {
# cat=plugin.tx_my_ext/urgences; type=boolean; label=Activer les urgences
activerUrgences = 0
}
}
Then in my setup.txt file I have this:
plugin.tx_my_ext.settings.activerUrgences = {$plugin.tx_my_ext.settings.activerUrgences}
Any reason why I wouldn't be able to access my settings using {settings} in my Fluid layout?
BTW, my extension name does include an underscore _ between the words. I have tried removing the underscore, then removing the tx_, and then a combination of those two.
Any help would be appreciated!
Thanks

Answer 1

For ext with key my_ext it should be plugin.tx_myext.settings
Make sure that you 'Included static from extension' in your TypoScript Template. If your ext is not available on the list add it in ext_localconf.php like that:
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile($_EXTKEY, 'Configuration/TypoScript', 'MyExt');
Do not forget to clear System cache and FE cache at least million times ;)
Use TypoScript object browser to check if on given page your plugins TS is still available (maybe something resets TS in meanwhile:
Finally make sure that you don't clear $this->settings array within your controller, if you do manipulate it for any reason assign it to the view again before view rendering,like that:
$this->view->assign('settings', $this->settings);