Problems Visualizing Indoor Airflow

Hey everyone,
I’m trying to visualize the indoor airflow in a simple shape I’ve made. I’ve followed this tutorial on youtube exactly, and have fixed a couple little things here and there (the p, U inputs, and changed the ‘interval’ in the Solution python coder to 3 instead of 2), and have finally gotten to the end where it plots the residuals for me. The 3D visualization isn’t appearing though and I’m not sure what I’m doing wrong… I’m sure this is a simple fix, but I’m not seeing what else I could be doing. Any help would be very appreciated!

I’m unable to upload a GH file because I’m a new user, but the definition is literally identical to the Interior Airflow template aside from changing the interval. Here’s a screenshot of the shape and the residuals being plotted but not the 3D vis. Thank you!