Assert fails when starting Bolt if the current scene is from an assetbundle / not in build settings

Bolt fails an assert (with an empty message) if you start Bolt (Server/Client/SinglePlayer) when your active scene isn't in the build. This is typically if the scene is from an asset bundle

To Reproduce

Repro project. Just hit play: https://drive.google.com/file/d/1s0IpQWnQuDfa3f15R64Sqk-FeUbfjwlr/view?usp=sharing

1) Have two scenes. Assign one to an asset bundle. Build the bundle. Make sure this scene is not included in the build settings

2) Start the game in the first non-bundled scene

3) At runtime, load the asset bundle, and load into the scene within it (Don't load it additively)

4) Call BoltLauncher.StartSinglePlayer (Or any of the other Start* functions)

Expected behavior Bolt starts normally

Actual behavior Bolt fails an assertion with an empty message. It does not proceed with startup.

Reproduced on both Windows 10 & Android

Additional context

Unity Version: 2019.1.6f1
Bolt Version: 1.2.9
Network Configuration: Default

BoltEngine / Bolt-Tracker

Assert fails when starting Bolt if the current scene is from an assetbundle / not in build settings #140