OpenKeychain and Password Store not working together

Borealis

Hi folks

I am new to GrapheneOS. I like it a lot!

Before, I was running CalyxOS on a Pixel 4a. I had installed OpenKeychain (https://f-droid.org/en/packages/org.sufficientlysecure.keychain/) serving as key provider for password store (https://f-droid.org/en/packages/app.passwordstore.agrahn/) using YubiKey.

Now on GrapheneOS I installed both apps but in OpenKeychain apps tapping Password Store tells me: "No such app found". In Password Store I cannot find any option to select OpenKeychain as key provider.

Has anybody experienced similar behavior? Could it be some kind of permissions that I did not configure correctly?

Thanks in advance for your help.

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Best regards