Tests fail with "Error in routine read_pseudo_nl (6)"

I have compiled QE v6.3 on Debian (amd64) and ran the test suite (cd test-suite; make run-tests). Five test cases keep failing:

pw_dipole - dipole.in: **FAILED**.
pw_relax - relax-damped.in: **FAILED**.
pw_relax - relax-el.in: **FAILED**.
pw_relax - relax-extfor.in: **FAILED**.
pw_relax - relax.in: **FAILED**.

Failure is reported as

 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     Error in routine read_pseudo_nl (6):
     Reading pseudo file (qfunc)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

     stopping ...
--------------------------------------------------------------------------
MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLD
with errorcode 1.

NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes.
You may or may not see output from other processes, depending on
exactly when Open MPI kills them.
--------------------------------------------------------------------------
[amalas:31716] UNEXPECTED MESSAGE tag = 107

I would appreciate any help with this issue.