It would help to see the data that you are trying to bring back into Revit and assign as parameter values. The top error I assume is being caused by you feeding elements into the “Value” input of the Set Parameter node.
You need to zoom into a node and press thr canvas export button (camera) when you do it make sure you have run thr script, showing the outputs of each of the nodes using the pin on the bottom of each node, and then stating what any errors are.
Currently nobody can help you because they cannot see your graph (open the image you posted and see the titles are missing)