When attempting to add a permission to an activity (in this case, add an email on quiz submission, as per - https://docs.moodle.org/36/en/Quiz_submission_email_notification), the first time I click the `+` sign, I see a Type error. Clearing the error and returning gets me to the dialog bot as expected:

`Cannot read property 'filter' of undefined`

```

TypeError: Cannot read property 'filter' of undefined at HTMLBodyElement.<anonymous> (

https://demomoodle.pexipacademy.com/lib/requirejs.php/1547352868/core/first.js:16:2194

) at HTMLBodyElement.e (

https://demomoodle.pexipacademy.com/lib/javascript.php/1547352868/lib/jquery/jquery-3.2.1.min.js:1:39946

) at HTMLBodyElement.dispatch (

https://demomoodle.pexipacademy.com/lib/javascript.php/1547352868/lib/jquery/jquery-3.2.1.min.js:1:42349

) at HTMLBodyElement.q.handle (

https://demomoodle.pexipacademy.com/lib/javascript.php/1547352868/lib/jquery/jquery-3.2.1.min.js:1:40376

) at Object.trigger (

https://demomoodle.pexipacademy.com/lib/javascript.php/1547352868/lib/jquery/jquery-3.2.1.min.js:1:69719

) at HTMLBodyElement.<anonymous> (

https://demomoodle.pexipacademy.com/lib/javascript.php/1547352868/lib/jquery/jquery-3.2.1.min.js:1:70229

) at Function.each (

https://demomoodle.pexipacademy.com/lib/javascript.php/1547352868/lib/jquery/jquery-3.2.1.min.js:1:2715

) at r.fn.init.each (

https://demomoodle.pexipacademy.com/lib/javascript.php/1547352868/lib/jquery/jquery-3.2.1.min.js:1:1003

) at r.fn.init.trigger (

https://demomoodle.pexipacademy.com/lib/javascript.php/1547352868/lib/jquery/jquery-3.2.1.min.js:1:70205

) at m (

https://demomoodle.pexipacademy.com/lib/requirejs.php/1547352868/core/first.js:16:439

)

```