[BUG] Blank map screen if no network is detected

[wangannie]

Describe the bug
If there is no network connection, the map screen get stuck on a white screen. This isn't an issue if I'm not logged in (Onboarding images appear) but once I try to access an account, I get stuck on the white screen.

To Reproduce
Steps to reproduce the behavior:

1. Log in as a guest (or an account)
2. Turn off cellular and wifi on the device
3. Force close the app
4. Open the app again
5. See blank screen

Expected behavior
Needs to have some sort of 'Network Error' message or screen.

Screenshots
If applicable, add screenshots to help explain your problem.
n/a

Device (please complete the following information):

• Device Model: [e.g. iPhone6] iPhone X
• OS: [e.g. iOS8.1] iOS13.3.1

Environment:
Which environment(s) is this bug located in?
Production

If the bug is located in production, find the version number under Menu > Settings

• Version [e.g. 1.1.0] v1.3.0

Additional context
Add any other context about the problem here.