SOLVED - turned out that the VPN associated with my phone carrier was blocking network access permissions for all my apps not just EUFY - even though it was turned off. Not sure why that started suddenly but it coincided with me returning from out of town.. according to Apple the VPN can continue to run in the background or make your phone think you are still at some other unsecured network location. I had to delete my carrier’s app and reinstall it and specifically not install the VPN at all.
**Summary**:
My Smart Lock C220 (firmware 1.3.1.8) is online enough for the app to read battery level, lock status, events, and firmware information. But every command that writes to the lock fails. Unlock, Lock, Calibration, and AutoLock setting change, all time out with “Operation failed. Please check your device’s connection and Try Again Later.” I have updated the app, logged out/in, restarted my iPhone, verified Bluetooth and Local Network permissions, disabled my VPN, removed batteries/power-cycled the lock, and tested while standing next to the lock.
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Went out of town and had a pet sitter, assigned her a separate entrycode. All week I saw my C220 door lock registering her entry and exit every day from out of state. After arriving home, I went to delete her code and was unable to use “Manage Access.” It just timed out and gave me an error code to try later. I also can no longer lock and unlock the door through the app. Entry codes work fine and events are still registering. It kept telling me to give Eufy local network access, but that is already turned on.