The "ReadLinesFromFile" task was not given a value for the required parameter "File". (issue #44)

This issue was reported on github:  https://github.com/qt-labs/vstools/issues/44

When building a .sln with v3.3.1 which hasn't been modified and worked fine with v3.2.0, I get the following error:

C:\Users\...\AppData\Local\QtMsBuild\qt_vars.targets(521,5): error MSB4044: The "ReadLinesFromFile" task was not given a value for the required parameter "File".

It's possible that it worked with v3.3.0, too, as the last successful build was after that version was tagged, but I don't know if there was an automatic update installed between it being tagged and that build.

To Reproduce
Steps to reproduce the behavior:

Currently unknown - the specific project's under NDA, so I can't provide it, and I'm about to finish work for the day, so want this posted in case anyone who knows something figures it out overnight. I'll try and come up with something tomorrow.

Expected behavior
This error doesn't happen, and the build succeeds.

Screenshots:

Desktop (please complete the following information):

Qt VS Tool Version 3.3.1
Visual Studio version: VS2022