It looks like you have no Public Server Key… is this a production electron or a beta electron? If beta perhaps it was never taken through the beta->production process.
At any rate, would you please backup your Electron image first and send it to me at 
You just need to put the device in DFU mode and run this command (note the replace with device id part of the filename):
dfu-util -d 2b04:d00a -a 0 -s 0x8000000:0x100000 -U electron_backup_replace_with_device_id.bin
In your email, please link to this thread so I have a history of things 
Then with your device in DFU mode you can run this command to restore your server key:
particle keys server
Thanks!