For the past 4 days my SmartThings Hub will not connect to the internet when ExpressVPN is enabled on my DD-WRT router, I have had this setup for a long time without any problems, if I disable ExpressVPN the SmartThings Hub reconnects, any one else ever had this problem (When expressVPN is enabled everything else in the house works as normal, Just not my SmartThings Hub)
Sounds like some type of DNS routing issue from ExpressVPN. Have you tried switching to a different ExpressVPN server location? You may wish to contact ExpressVPN support to see if they can assist. What is the color of the led on the front of the ST hub? What country are you in and which Express VPN server location are you connecting to? I still think this may require assistance from ExpressVPN’s support.