In the tutorial, the order of arguments is reversed. Doing it the way it is written sends the language code to the session variable which leads to the $ is not applicable for atomic vectors error since "en" or "pl" would be a string and not a session object. There is nothing wrong with the update_lang() function (I've checked that as well).
Description
In the tutorial, the order of arguments is reversed. Doing it the way it is written sends the language code to the session variable which leads to the
$ is not applicable for atomic vectorserror since "en" or "pl" would be a string and not asessionobject. There is nothing wrong with theupdate_lang()function (I've checked that as well).The PR fixes the tutorial with a small commit.