That's a very old version of Ledger Live, we're currently at version 1.9.1... and my understanding is that firmware 1.2 never connected to ANY version of the Ledger Live. You needed to be on firmware 1.3.1... and the only way to get from firmware 1.2 to 1.3.1+ was by using the old Chrome Ledger Manager plugin.
I'm led to believe that the Chrome Ledger plugin no longer works for firmware updates.
I'd rather find a way to update it - if anybody can help, I would appreciate it so much.
Did you try
my suggestion in your other thread? I think the stumbling block will be finding a copy of the firmware to be able to flash it... it's possible you need to update the bootloader as well, hence the requirement to actually replace the device.
Honestly, I think the best solution is to contact Ledger support, advise you are on firmware 1.2 and ask them directly what you need to do to fix this issue. As mentioned in my other post, the Ledger devs/support seem a lot more active on reddit that here:
https://www.reddit.com/r/ledgerwallet/