pgstrp error

When I run

pgfortran -V

I get the following:

pgfortran 18.10-1 64-bit target on x86-64 Windows -tp haswell
PGI Compilers and Tools
Copyright © 2018, NVIDIA CORPORATION. All rights reserved.
pgfortran-Error-Required tool pgstrp was not found

plus many more lines

It seems to be looking for ‘pgstrp’ but cannot find it.

Any ideas?