I am having trouble validating my custom slot values, here's what I have been doing thus far. Essentially, I am taking in a location value and then it passes through various methods, spitting something out at the end. However, I want to be able to check if its null. So if there is no value in the location slot, it will tell you it doesn't recognize the building.
I have tried other variations such as removing the check for the value itself, but nothing has been working. I am only getting the response error "There's a problem with the requested skill's response." I don't want to use the Alexa dialog state (if that would even apply in this situation). If you need any more details, please feel free to ask!