Only the administrator is allowed to login to the mobile app. All the other students get the message: "Invalid response value detected"
I just upgraded from Moodle 2.9 to Moodle 3.3 and working on the latest Moodle mobile app.
I found an old thread https://moodle.org/mod/forum/discuss.php?d=320873 which discusses the same issue but all solutions presented here are not working for me. Purged all cache and students have rights to create a mobile web token.