I have generated a paper wallet of 21 word seed from Yoroi few month ago. When I come back with new version of Yoroi recently. It seems they have been removed the restore function for paper wallet. I also tried Daedalus but no working too. If you have any other option, please support.
Hello @Lichnowski
Yoroi still has recovery for paper wallets as far as I can see.
You need to select
Wallet / Claim/Transfer ADA
then you select Byron.
Then choose Icarus/Yoroi Wallet tab and select:
Legacy Yoroi paper wallet
This will open a window for 21 Word Phrase paper recovery.
However, you need to have a new address ready since it will ask you to make a transaction to move your ADA.
Hope this helps 
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How it become legacy so fast.
It is clear for me now.
Many thanks for your time.
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