(BUG) Cannot load app page

Verify the following before opening an trouble issue

Go over all the following points, and put an x in all the boxes that apply. If you're unsure about any of these, don't hesitate to ask. We're here to help!

[ ] That OAuth is Enabled for the SmartApp under the IDE.
Not sure what this means
[x] The App/SmartApp and Device Handler/Driver are using the latest code available.
[x] You have reviewed the Echo Speaks Documentation for potential fixes.
[ ] That Both the Apps/SmartApps and Device Handlers/Drivers have been Published for You in the IDE.
Not sure what this means

About Your Setup

Hub Platform (SmartThings or Hubitat): Hubitat
How many devices are detected?: 1
iOS or Android?: Android
Mobile App Version(Not required):
App/SmartApp Version:
Device Handler/Driver Version:
Heroku Server Version:

Expected Behavior

Hubitat app page should load

Current Behavior

Hubitat app page does not load

Steps to Reproduce (for bugs)

Provide a link to a live example, or an unambiguous set of steps to reproduce this bug. Include code to reproduce, if relevant

Deregister an echo device
Go to Hubitat App page

Context

This just started today after I deregistered an echo device. I wanted to update the devices that are registered in Hubitat.

This is the error I get when it tries to load the page: 2022-01-15 08:36:23.015 am [error](http://.../installedapp/configure/146)java.lang.NullPointerException: Cannot invoke method replace() on null object on line 6103 (method startPage)

tonesto7 / echo-speaks