I talked to 2GIG technical support and they these are signs the panel has hardware failure. The only troubleshooting steps than can be performed is the power reboot in hopes it can fully power up when retying.
From the link below, you can use the current backup on a GC3 or a GC2e. There are also instructions if you would like to perform a restore on one of the compatible panels.
If not, you can upgrade the panel to an IQ Panel 4 with the 345Mhz Radio or an IQ4 Hub with the 345Mhz Radio so you can reuse all your sensors just that the sensors will need to be programmed manually.