Render error screen when errors exist, render loading screen, adjust …

[willhobson85]

…width on error screen

What does this PR do?

• [] New feature (adds functionality)
• [X] Debugging/Refactor

Implementation/Changes:

• Render error screen correctly, render loading screen, adjusted width on error screen

Where should your reviewer start?

• app.js conditionals

How Has This Been Tested?

• [X] I tested my changes in the browser
• [] I tested with Cypress

Checklist:

• [X] My code follows the style guidelines of this project
• [X] I have performed a self-review of my own code
• [X] I have commented my code, particularly in hard-to-understand areas
• [X] I have made corresponding changes to the documentation
• [X] My changes generate no new bugs
• [] I have added tests that prove my fix is effective or that my feature works
• [] New and existing unit tests pass locally with my changes