Missing construction material can cause contractors to get stuck in a loop where no construction is completed

The Contractors cant find the Way to work. I dont know why.

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COLLECTED HARDWARE DATA
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Device
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Model: P370EM (CLEVO)

Operating system: Windows 10 (10.0.0) 64bit

RAM size: 16 GB

Battery status: Charging
Battery level: -1

Processor Device
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Type: Intel(R) Core(TM) i7-3630QM CPU @ 2.40GHz
Core count: 8
Frequency: 2 GHz

Grahpics Device
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Vendor: NVIDIA
Type: NVIDIA GeForce GTX 670M
Memory Size: 1 GB

Screen Summary
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Full Screen: True
Resolution: 1920 x 1080 @ 60Hz