error processing security key

[artemka003]

Hello everyone. there was such a problem on one of the follower : error processing security key. error processing data - empty. The settings of both the master and follower applications have not changed. at the same time, the status of the xdrip cloud is specified as connected. and you can see all the participants. This error also occurs periodically on another follower, but after a while the glucose data arrives. and there has been no data on one device for 12 hours already.

[Navid200]

What is the status of this?

When the follower does not receive data, can it access the internet?
To test that, send an email to a different email address you own. Can you then receive it on the follower phone that is not receiving data?