Building a Pourbaix Diagram manually: (Error) Reference solid not contained in entry list

Referring to the last section of this notebook titled “Building a Pourbaix Diagram manually,” I tested the code and found it to work fine with the Bi-V-O-H system, as shown in the example. However, when I changed the system to “Ti-C-O-H,” I encountered the following error. “ValueError: Reference solid not contained in entry list”

Code Link: https://github.com/materialsvirtuallab/matgenb/blob/dfaf5401c5f2f44cf0f2076509079228e236805d/notebooks/2023-03-10-Plotting%20a%20Pourbaix%20Diagram-new.ipynb

Error:

@Joseph_Montoya @mattmcdermott @tschaume