Site to Site suddenly not working & Devices partially disappeared

I was using my network the last two days and it was working perfectly.

I can see my devices as online in the Devices tab (MT2500 #1 & AR300M #1), and I can get to them remotely, but when I go Site to Site, the network that I was using up until early this morning is no longer there.

When I went to "+ Create Network" Only the AR300M #1 was visible, so I grabbed another MT2500 #2 figuring that something went wonky with the original MT2500 #1, so I'd just setup a new network.

Typically I have to delete the old network before connecting a new device to the existing one, but I couldn't see the network so I took a chance and tried to set up a new network.

I selected the MT2500 #2 & AR300M #1 and was unsuccessful in setting it up because i forgot to port forward my new MT2500. When I fixed the port forwarding, I went back to set up the VPN, 300M #1 was no longer visible in the 'Create A Site To Site Network' side window. 300M #1 was still visible in the Devices Tab.

I then attempted to use MT2500 #2 with another AR300M #2and when I set it up it said it couldn't access my device because neither device was port forwarded.

Unfortunately, after I went back into the "Create A Site To Site Network" both MT2500#2 and AR300M #2 no longer Appear.

Can you help me solve this?

Can you provide your device name or s2s network name