@Robertgmcneill
This is what I did and it seemed to stop the same errors that you are getting.
Open Echo Speaks app, click on Alex Devices - Manage Devices, Unused Devices, at bottom click on Override Blocks and Create Ignored Devices, click Done, again click Done, once more scroll down and click Done.
Watch you Logs and see if that helped.
That what I did and now for some reason, I no longer get those errors anymore.
