I just got an apple watch series 2. It allowed me to check my heart rate and then ask siri to open the app and check it. Now if I ask Siri to check my heart rate it says com.apple.siri.nl.AppNamefbf76?

It sounds like there may be a glitch with Siri's ability to access the heart rate app on your Apple Watch Series 2. Try restarting your watch and your iphone to see if that resolves the issue. If the problem persists, you can also check for any software updates for your watch and phone, as updates often fix bugs. If all else fails, consider resetting your watch or reaching out to Apple Support for further assistance.