Hi Carles,
You might need to move the mural esfera a bit towards the forma logia (or the other way around, the forma logia toward the mural esfera).
If that doesn’t help, you need to see if the Normals are all correct (in Edit Mode select all with A and then SHIFT+N. Do that for both Objects) and make sure that the forma logia is ‘watertight’ (no hole on one side).
The Scale of your Objects should be 1, 1, 1 and that is not what you have:

To Apply the Scale, Select the Object (stay in Object Mode) and press CTRL+A > Apply > Scale.