Parallel processing failing running script

[pollaro]

One of the processes in our codebase uses the parallel pool. We initialize a pool using gcp. Then we set NumWorkers on this pool. We're getting this error:

  Error occurred while setting up or tearing down ResultRankTestCase.
  As a result, all ResultRankTestCase tests failed and did not run to completion.
      ---------
      Error ID:
      ---------
      'MATLAB:noSuchMethodOrField'
      --------------
      Error Details:
      --------------
      Unrecognized method, property, or field 'NumWorkers' for class
      'parallel.Pool'.
      
      Error in nla.TestPool/initializeParallelPool (line 19)
                  number_processes = p.NumWorkers;
      
      Error in nla.TestPool/runEdgeTestPerm (line 168)
                  [num_procs, blocks] = obj.initializeParallelPool(num_perms);
      
      Error in ResultRankTestCase/loadInputData (line 86)
                  testCase.permuted_edge_results =
                  testCase.tests.runEdgeTestPerm(testCase.edge_test_options,
                  testCase.permutations);
  ================================================================================

We do have the Parallel Computing Toolbox and I do install it during the set-up process