Symbolic regression does not output equations

The tutorial https://datadriven.sciml.ai/stable/examples/symbolic_regression/#symbolic_regression_tutorial on 1.7 does not output the equations, it only returns: 
```
julia> sys = result(res)
Model ##Basis#430 with 2 equations
States (2):
  x[1]
  x[2]
Parameters (0):
```