Dear Natalia,
As Diellza writes, please ensure that the input geometry = the street network is “cleaned” – without overlapping lines etc. This needs to be done very carefully. Otherwise, it is nearly impossible to find issues in the Grasshopper definition. For most of your colleges with the same issue, this solved it.
From your screenshot, it seems that you use an older version of the DeCodingSpaces components. It’s probably a good idea to update it and use the latest Grasshopper definition (posted above in this topic as attachement).
Best regards
Reinhard