Valiant stamps are not working. Tried to trade some in for t4a

I have 28 valiant stamps. But they are not recognized in the store now. Says I have zero. How can I use them?

Comments

Did you convert them to the new version

Did not know we needed to.

https://forums.playcontestofchampions.com/en/discussion/376936/daily-card-conversion-gone#latest

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