Assertion failed, What does it mean?

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1

Assertion Failed: GetSuspendKey(L) == suspendkey(C:\rb\ihome\root\SH_OK0-BUILD\stonehearth\source\lib\lua\ai\thread.cpp:134)
What does this mean? It keeps popping up as its own window under the game.

2

Also getting this Engine Error lots

release-790 (x64)[M]
…ices/client/renderer/construction_render_tracker.lua:20: attempt to index field ‘_bp’ (a nil value)
stack traceback:
[C]: ?
…ices/client/renderer/construction_render_tracker.lua:20: in function ‘__user_init’
radiant/lib/unclasslib.lua:270: in function ‘__init’
radiant/lib/unclasslib.lua:201: in function ‘ConstructionRenderTracker’
…ers/construction_data/construction_data_renderer.lua:25: in function <…ers/construction_data/construction_data_renderer.lua:13>