Display notifications for typical problems that may cause the Mobile app to don't work as expected

As admin enable debugdisplay (admin setting) Go to Plugins -> Manage outputs -> Manage message outputs and disable the Mobile notifications plugin (if it was enabled) Enable the external database authentication plugin enabling the "Debug ADOdb" option Enable "Mobile services": Site administration ► Mobile app ► Mobile settings Check that you see warnings for: Display errors (debugdisplay) ADODb debugging Mobile notifications not enabled You may also see a warning about not using HTTPS if your site does not use a local certificate If you site use a self-signed https certificate you may see additional warnings "It seems that the site certificate is self-signed or not trusted" You may also modify in the site DB (config table) the setting "userquota", setting as value a numeric higher than the platform maxint (something like 898293482983492834928349234928342983492834). In this case you will see also a user quota warning message.