Started having problems with two WEMO mini-plugs yesterday with them not responding. I tried disabling them and re-enabling, no joy, then deleting the add-on and adding it back. In the log, I see the following:
2020-07-10 08:40:48.376 ERROR : wemo-adapter: Error communicating with Bedroom light 1 at 192.168.1.112:49153, retry 0
2020-07-10 08:41:07.533 INFO : date-time-adapter: date_adapter.py:51 INFO cancel_pairing
2020-07-10 08:41:16.456 ERROR : wemo-adapter: Unable to re-probe wemo at 192.168.1.112
2020-07-10 08:41:51.712 INFO : Unloading WemoAdapter
2020-07-10 08:41:51.732 INFO : wemo-adapter: Adapter: WemoAdapter unloaded
2020-07-10 08:41:59.943 INFO : Loading add-on: wemo-adapter
2020-07-10 08:42:37.890 INFO : Unloading WemoAdapter
2020-07-10 08:42:37.911 INFO : wemo-adapter: Adapter: WemoAdapter unloaded
2020-07-10 08:42:45.318 ERROR : Error setting value for thingId: wemo-2269B1K0106B3A property: on value: true
2020-07-10 08:43:03.790 INFO : Loading add-on: wemo-adapter
2020-07-10 08:43:16.333 ERROR : Error setting value for thingId: wemo-2269B1K01047C2 property: on value: true
2020-07-10 08:43:34.907 INFO : Unloading WemoAdapter
2020-07-10 08:43:34.927 INFO : wemo-adapter: Adapter: WemoAdapter unloaded
2020-07-10 08:44:08.521 INFO : Fetching add-on https://s3-us-west-2.amazonaws.com/mozilla-gateway-addons/wemo-adapter-0.3.0.tgz as /tmp/J3coTK/wemo-adapter.tar.gz
2020-07-10 08:44:09.435 INFO : Expanding add-on /tmp/J3coTK/wemo-adapter.tar.gz
2020-07-10 08:44:14.574 INFO : Loading add-on: wemo-adapter
2020-07-10 08:44:32.241 ERROR : Error setting value for thingId: wemo-2269B1K01047C2 property: on value: true
2020-07-10 08:46:01.223 ERROR : Error setting value for thingId: wemo-2269B1K01047C2 property: on value: true
2020-07-10 08:46:05.843 ERROR : Error setting value for thingId: wemo-2269B1K0106B3A property: on value: true
2020-07-10 08:46:08.826 ERROR : Error setting value for thingId: wemo-2269B1K0106B3A property: on value: true
I went to the WEMO phone app and saw that a there had been an upgrade and did I want to download it. so far I have not.