where should i provide the error
General developer forum
instllation of custom certificate throws "need moodle version" error, where should i provide the version
This isn't really a developer question, but it sounds like you've tried to install plugin which was written for a more recent version of Moodle than you have on your site. The error should tell you exactly which Moodle version it requires.
I suggest you either need to find a version of the plugin that is compatible with your Moodle site (check Site admin > notifications to get the version number for your Moodle site), or you need to upgrade to a more recent version of Moodle.