Trying to run examples

[Elexy]

I am trying to run the examples in https://github.com/pact-foundation/pact-workshop-message
I know it's not your repo, but the error Request Failed - builder error baffles me.
The consumer side work fine.

RUNS  src/product/product.pact.test.js
[17:19:11.623] INFO (157985): pact@13.1.4: Verifying message
[17:19:11.629] INFO (157985): pact-core@15.2.1: Verifying Pacts.
[17:19:11.629] INFO (157985): pact-core@15.2.1: Verifying Pact Files
 RUNS  src/product/product.pact.test.js

Verifying a pact between consumer and provider

  Message 0 (0s loading, 10ms verification)
      Request Failed - builder error


Failures:

1) Verifying a pact between consumer and provider - Message 0 - builder error


There were 1 pact failures
 FAIL  src/product/product.pact.test.js
  Message provider tests
    product api publishes an event
      ✕ can generate messages for specified consumers (26 ms)

  ● Message provider tests › product api publishes an event › can generate messages for specified consumers

    Verfication failed

      at node_modules/@pact-foundation/pact-core/src/verifier/nativeVerifier.ts:52:20

Test Suites: 1 failed, 1 total
Tests:       1 failed, 1 total
Snapshots:   0 total
Time:        0.496 s, estimated 1 s
Ran all test suites.
make: *** [Makefile:49: test] Error 1