Can't login, stays on login screen

Problem

After you have entered your email/pass, you are not redirected to the admin backend.

Cause

One possible cause could be that your Firebase Database permissions are not correctly set up.

To check if that is the case, in Builder/src/index.js around line 84 replace the function "startSettingBackednLanguage" with this one 

function startSettingBackednLanguage(){
 
  //1. Get user language
  var curLangRef = firebase.app.database().ref('users/'+firebase.app.auth().currentUser.uid);
      curLangRef.on('value', function(snapshot) {
            var currentLangData=snapshot.val()&&snapshot.val().language?snapshot.val().language.toUpperCase():"GB";
            language=currentLangData;
            Translation.fetchAndSetLanguageAndSetUser(currentLangData,false,function(allAvailableLanguages){
              loggedIn=true;
              availableLaguages=allAvailableLanguages;
              displayApp();
            });
            
        },function(e){
          alert(e.message)
        });
}

After this change, you should get a popup alert, that you don't have permissions for access.

Solution

Change your Real-time Database Permissions 

Suggested permissions are described here

https://mobidonia.support-hub.io/articles/step-0-create-firebase-project#create-a-real-time-database