yesterday a trusted old Core of mine suddenly was not being able to connect to the cloud anymore: three red blinks. When I tried to connect a new photon, I got the same problem, however, when I updated the Particle app and than tried to setup that new photon, it all worked. However, the Core still is not able to connect to the cloud. Tried on different networks (checked that they all are 2.4GHz).
In trying to solve this, I did remove the Core from my account, which might have set me back even further, cause now I can not reclaim it.
I also tried to use the CLI setup tool, same problem: when it tries to connect, it flashes green, than three red blinks and back to flashing green.
any ideas / suggestions? Did the app update change anything serverside that could effect old Cores?