if you have upgrade your iOs device to iOs9 you will notice that Moodle Mobile is not working.
This is because iOs9 has introduced some regressions in the WebView component used by the app and this change make the app to display multiple errors.
We fixed that bug last Friday (in Moodle Mobile 2.2) but this version is still in review. Hopefully this new version will be published in following days.
More information here:
We're very sorry for the inconveniences, Juan