In build 1608, the crash mentioned in the subject occurs.
Many worlds based on the Chikuwa Vehicle System 2 have been broken by the recent update. They were working fine in build 1607.
The crash happens in GetComponentShim.GetComponentInChildren, but I haven't been able to find a reliable reproduction process yet.
Sample worlds affected by the issue:
Oi Wharf V2 Remastered[90sGDSP]
UraRokkou
Futatsukane Lake Around Pass
Dodge Stadium
Drift Park S.L.