The salt lights flashing Red and Green, like a railroad crossing, is normal for the first few minutes the cell is on, as it does its calibration...
A flashing "Cell" light means the cell is dirty or is dead... If you have cleaned it and the Cell light continues to flash it usually means the cell is no longer working.
I am puzzled, as this would not normally cause you to not have communication with the cell..
On the other hand, no communication would not cause the cell light to flash.
How old is the cell??
It's at 80% in your pic.. What was it running before you initially posted?Having it at 8% and 12hrs runs is fine ?