Disable (temporary) NextDNS on Android?

How do I temporarily disable NextDNS on my Android phone?

I was in a Costco store and couldn't connect to the Wifi (Only AT&T inside the store, need Wifi access).   I could connect to the Wifi, but there was no network connectivity.

I'm guessing that it's the NextDNS that is not allowing the connectivity.

I went through all the settings, but couldn't figure out how to disable the NextDNS to try it!

Mike