Same error as doge, can't add with 12 word wallet.
I don't like that for Bitcoin they are still using old style addresses starting with 1, and wallet is still in beta phase, but it works fine.
Probably best option for multicoin wallet is combination with some hardware wallets, but I saw other wallet called Stack also supports doge.
There are a couple of options for multicoin wallets, each have their own good and bad things. Although I don't like them in general, for a few dollars of coins they
work well enough. As I said, storing real amounts in a hot wallet is just asking for trouble. I tried atomicDEX.io it did work with no issues, didn't do something I needed, don't remember what. But no problems with it not working.
March of 2022.
-Dave