I'd recommend running a client monitor to see what part of the connection is failing. If you can let me know which HiveManager platform you're using, I can provide a guide that reviews how to run a client monitor.
This guide will walk you through how to determine which HiveManager you are using, for reference: https://thehivecommunity.aerohive.com/s/article/Which-HiveManager-Platform-am-I-using
