Nebula shows 0 client connected

Hello,

I have a Nebula organization that uses 6 AP, 5 of them are NWA1123-AC Pro. The last one is WAC6103D-I.
All of those are up to date.

My problem is that no client are shown in the nebula manager and no traffic logs are shown either. But there are users connected to this. In the past it worked but it doesn't work atm. What can i do ?

Thanks in advance for your help,

Regards,