# App Sign-in has stopped working **URL:** \ **Category:** Questions about Thunkable X\ **Tags:** firebase, beginner, help\ **Created:** [December 10, 2022, 12:12pm UTC](https://community.thunkable.com/t/app-sign-in-has-stopped-working/2174216 "2022-12-10T12:12:06Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![andos-avlog](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/andos-avlog/32/122340_2.png) [@andos-avlog](https://community.thunkable.com/u/andos-avlog)\ **Post date:** [December 10, 2022, 12:12pm UTC](https://community.thunkable.com/t/app-sign-in-has-stopped-working/2174216/1 "2022-12-10T12:12:07Z")
Hi, after enduring a barrage of medical appointments I finally returned to my app project to find that my app’s login page no longer works. After clicking the “ **Login** ” button the screen just stops at the “ **Loading Icon** ” and does not proceed past this. Even using the **Live Test** produces the same problem. My app has never been published. I have not altered or changed anything on this screen since I created it so, realistically, it should still work. I have tried searching through the Community to see if anyone else has experienced the same thing but could only find issues regarding Google Sign-In. Does anyone know what might have caused this? Has Thunkable changed something in its blocks or maybe there is an issue with Firebase? Any help regarding this issue would be greatly appreciated. **My Project:** AvLog Group App **Link:** [Thunkable](https://x.thunkable.com/copy/7c34e4d86ee357b72b4d173d08516ef0) Andos ---
**Author:** ![tatiang](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/tatiang/32/55482_2.png) [@tatiang](https://community.thunkable.com/u/tatiang)\ **Post date:** [December 10, 2022, 4:59pm UTC](https://community.thunkable.com/t/app-sign-in-has-stopped-working/2174216/2 "2022-12-10T16:59:18Z")
My guess would be that the `list of values` block might not be working properly in the Get User function. What debugging have you done inside the Sign In block to figure out where exactly the problem is happening? ---
**Author:** ![andos-avlog](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/andos-avlog/32/122340_2.png) [@andos-avlog](https://community.thunkable.com/u/andos-avlog)\ **Post date:** [December 10, 2022, 6:34pm UTC](https://community.thunkable.com/t/app-sign-in-has-stopped-working/2174216/3 "2022-12-10T18:34:37Z")
Hi @tatiang, I have done anything in my blocks because when I originally created this screen I copied a You Tube video so I don’t really understand much about the sign-in setup. Here are my blocks: ![Login Screen blocks-Screenshot 2022-12-10 18.32.44](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/3/5/35eb9b6de1378ae7d2ca4fcf2fece2f3fbb01d43.png) How do I debug it? Do I replace the **list of values** blocks by creating new ones or would that make things worse? Here is my Firebase Sheet: ![Firebase-Screenshot 2022-12-10 18.44.17](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/1/9/1945d18f89f1a2b84f9235263db134e76657dfea.png) Andos. ---
**Author:** ![tatiang](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/tatiang/32/55482_2.png) [@tatiang](https://community.thunkable.com/u/tatiang)\ **Post date:** [December 11, 2022, 1:01am UTC](https://community.thunkable.com/t/app-sign-in-has-stopped-working/2174216/4 "2022-12-11T01:01:19Z")
Here’s a method I use to debug blocks in Thunkable: > [@Debugging in Thunkable X (Video)](https://community.thunkable.com/t/debugging-in-thunkable-x-video/849471): > > I thought I’d share a process I use for debugging my projects. It involves creating a function that can be used over and over throughout the code blocks in order to help determine where things are going wrong, whether or not certain blocks are ever triggering, and what the values of several variables are. Here’s a screenshot of what I’ve set up: The real power comes from being able to quickly change the delay (and even set it to 0 seconds) or just remo… ---
**Author:** ![andos-avlog](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/andos-avlog/32/122340_2.png) [@andos-avlog](https://community.thunkable.com/u/andos-avlog)\ **Post date:** [December 12, 2022, 4:00pm UTC](https://community.thunkable.com/t/app-sign-in-has-stopped-working/2174216/5 "2022-12-12T16:00:53Z")
Hi @tatiang, please see link to see what happened when I copied your blocks. I accidentally replied to the link you posted. > [@Debugging in Thunkable X (Video)](https://community.thunkable.com/t/debugging-in-thunkable-x-video/849471/6): > > Hi @tatiang, using the video you sent to me, I created the Debug blocks (See below) Debug blocks [Debug\_Variable\_Block-Screenshot 2022-12-12 15.07.43] [Debug Blocks-Screenshot 2022-12-12 15.06.50] I then tried to get them to work to find my issues by adding a User\_Values\_Label to the Debug blocks. The plan was to find if my Login Page was searching for my Username during the Login process. See video for what happened: [https://youtube.com/shorts/ZEI4W-9GP5g?feature=share](https://youtube.com/shorts/ZEI4W-9GP5g?feature=share) Andos Andos. ---
**Author:** ![system](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/0/f/0f59f292712368bce16ff80133ae10de8a6f27e8.png) [@system](https://community.thunkable.com/u/system)\ **Post date:** [March 12, 2023, 4:01pm UTC](https://community.thunkable.com/t/app-sign-in-has-stopped-working/2174216/6 "2023-03-12T16:01:53Z")
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