Generic Substrate chain address is not supported - Bittensor/Polkadot

So I’m trying to import a Polkadot wallet but to no avail. Its for my $TAO on the Bittensor Chain.

Error message reads “Generic Substrate chain address is not supported”

Why is this?
What other options do I have?
I’m clueless here…

It would be nice to add support for a Generic Substrate address as an interim solution before your devs add support for individual token chains on the substrate network.

Here is the relevant technical documentation:

Polkadot Accounts In-Depth · Polkadot Wiki