Drop In Unavailable

[dsegel4]

All devices and contacts (including ourselves) have been enabled for Drop In and are connected to the same network.  I can drop in on one device but when that device tries to drop in on mine, Alexa's voice says I am unavailable.

I've searched high and low for an answer to this. Please help.

[renegade600]

make sure "do not disturb" is disable

[dsegel4]

make sure "do not disturb" is disable

It is disabled and, actually, now both devices are saying "not available."

[renegade600]

try a power cycle on your router and modem.  pull power plug for a slow 10 count, plug the modem and wait for it to cycle on then the router.