@manrobles @guru.larsson @cuentaproyecto5000 (and everyone else reading).
We have made progress on this issue this morning and can now reproduce it at-will in house and have developers looking at it. I've added all of your names to a list to contact as soon as we have a resolution, and of course I'll update here as well.
We now believe 'Server Error', 'There was an error loading your data', and the blank Arduino dashboards on Android are all related to the same root cause.
Until we have a fix, force-stopping the app and clearing App Data should temporarily resolve the issue. You'll need to re-login, and then you should see your account OK. In our testing, you can avoid re-occurrence of the bug by leaving the app open and backgrounding it when you're not using it. Something about closing the app seems to trigger the issue to reoccur. If it re-occurs, force-stop and clear app data again.