Oh wow. This system has been running for only about 6 months, on a new Samsung A2 EVO sd card. Is there a way to increase the lifespan of the card? That's a hefty price to shell out on this frequent basis if this is normal for a card to die this fast.
First and the easiest is to check the SD-card. "Make a backup of Kodi data that you care about if/while you still can" and you could verify the card in a card reader and PC. If you able to format it and to copy data to it with a resonable speed, should be OK. Reinstall the LE, try to boot it, and if working, restore the backup.