Error Transitioning from WAB 1.2 to 1.3

[deleted-user-dbQhBq-o3nyM]

I was using WAB 1.2 and deployed an application located here: https://maps.carbon.utah.gov/CarbonCountyMobileMap/ with it. Then 1.3 came out. I downloaded it and started it. It gave me an error, so then I thought I had to register the application on ArcGIS online again. I did, but still get the error. Below is a screenshot of the error I've been getting:

I'm not sure why this is. Did anyone else have problems making the transition? Is there a specific set of instructions on how to transition from 1.2 to 1.3?

[deleted-user-dbQhBq-o3nyM]

After downloading node.js and running the update, then deleting and recreating the signininfo.json, I was able to update to 1.3 and it works.

Thank you all for the feedback! I appreciate it.