This works fine for me, such a config starts and runs fine. It is like that module-config reads "validator iterator" instead and does not include the respip module. There have been changes to the services/modstack.c file but not for the module find function, and to the module code with the new startup callbacks, but there was no change for this check in particular.
The new module startup call was not been added to the windows service startup routine. Hence the respip module was not registered yet, and could not be found. The linked versions call the module startup functions in win_svc.c, and that should fix the issue.