Errors while running DeepMind's publicly available code regarding their recent mathematical breakthrough

I am trying to re-produce DeepMind's recent result, in which they found new examples of mathematical objects using LLM's.

I am trying to execute their publicly available code on GitHub. However, despite running all of the code in the "implementation" folder, I keep getting the error "no module named funsearch found". Note that the file named "funsearch" gives the same error.

Why is that?