Hello @AaronPulver i use arcgis enterprise. this my first time using track viewer app. btw i already enable location tracking in portal setting. as of today we validate the data store of spatialtemporal but the problem still exist.
If you open developer tools in your browser and go to the network tab then try to create a track view do you see any more details in any of the requests/responses? Based on the error you posted, this seems like an issue with the feature service or datastore not being able to actually create the view layer correctly. You may have better luck trying to troubleshoot with customer support if you're not working with them already.