The one I downloaded from the gallery using Install-Module Psgraph is version 2.1.33 (Which I couldn't find in any of your psd1 on any of your branches).
I wanted to apply the fix my self, and PR it, but, It seems already been fixed on your master branch, although on the one I download, it is not the case (and is a higher version then the one on github)
I think there is also a problem on the versions between the one available on the gallery, and the one you have on your master branch.
I had the following error: https://github.com/KevinMarquette/PSGraph/issues/85
The fix had been implemented and merged in this PR --> https://github.com/KevinMarquette/PSGraph/issues/78 (the PSD1 indicates version 2.1.30)
The one I downloaded from the gallery using Install-Module Psgraph is version 2.1.33 (Which I couldn't find in any of your psd1 on any of your branches).
It was actually missing a part of that fix:
it has in Export-PSGraph:
instead of:
which caused me a few issues.
I wanted to apply the fix my self, and PR it, but, It seems already been fixed on your master branch, although on the one I download, it is not the case (and is a higher version then the one on github)