Airdrop doesn't see other devices
Macbook pro 15 inch 2017 with sierra 10.12.6.
When I open airdrop, neither of the other two airdrop devices in the room are seen.
They see each other and they see my macbook pro. they can send files to me, but I can't send files to them.
I have restarted the macbook pro and the iPhone, but nothing changes.
I have turned off the firewall and nothing changed.
What else can I try?
Why the fork am I "not allowed to create or update this content?"
What the fork good is a support group if one can't post to it?
MacBook Pro, sierra 10.12.6