Dynamo doesn't run any scripts

Hi everyone. I’m new in dynamo and i’m trying to use a script that joins elements, like walls for example.

Then, this message suddenly appears. Anyone ?

message:Warning: One or more geometries have failed to convert due to this error: Method ‘Difference’ in type ‘Autodesk.LibG.SurfaceHost’ from assembly ‘LibG.ProtoInterface, Version=, Culture=neutral, PublicKeyToken=null’ does not have an implementation.

what version of Dynamo is this?

Sorry. Revit 2019. Dynamo 2.0.3. Win-10

Try a reinstall of Dynamo. I’ve had to do this for other people.

hmm, your title says no scripts run, but this error is correct, I think in that version of Dynamo Surface types indeed do not have a difference method - so whatever geometry you have selected may not be convertible. Try simpler geometry to test out if its the specific geo or something is more generally wrong.

I did, several times.

I selected two simple walls to join with each other. The script is running, sorry, but in revit nothing happens. No actions show to return in revit return action arrow