Working through the basic examples in the Wolfram documentation related to the FitBit service connection. I'm able to get a proper ServiceObject from:
fitbit = ServiceConnect["Fitbit", "New"]
Running ServiceExecute for the "ActivityData" requests as shown in the example returns results as expected. However, running a similar ServiceExecute on "StepsPlot" does not return any results. I've gone through several other available requests (e.g., "SleepDate", "UserDate", "CaloriesTimeSeries", etc.) and what I'm finding is that requests that take "StartDate" and "EndDate" parameters don't seem to work for me.
I'm running Mathematica "11.2.0 for Mac OS X x86 (64-bit) (September 11, 2017)". Again, not really doing anything fancy other than copy-n-pasting the examples from the documentation and slightly adjusting date ranges to reflect "real" data for my case. BTW, leaving the exact dates from the example seems to make no difference in behavior (e.g., still getting back symbolic result).
Any ideas on what I'm doing wrong or missing here?
Below is a screen shot of my notebook for reference.
