Error when using --show-changes flag

[ia-mfriegang]

I am trying to use Pluralith to create a local PDF file, this works fine with the --local-only flag. However, when I add on --show-changes, I get an error:

posting diagram to pluralith Dashboard failed -> PostGraph: parsing response failed -> LogLocalRun: invalid character 'S' looking for beginning of value

I have tried a variety of combination of flags, and the common one that seems to cause the error is --show-changes. Any idea what might be happening here? I'm happy to share my pluralith strip output if needed as well.