Well eventually, I ended up finding the problem.
Indeed, there was a conflict with a .sgbin file of this mod:
Transportation - Monty's Bridge Pack (XL and XXL)
So I corrected the error.
In addition, I took the opportunity to correct this problem,
Before correction:
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XLN's future is looking kind of grimTransportation Modern cable-stayed bridge 1.1
A 30 m avenue bridge based on Principe de Viana bridge in Lerida Spain