Invalid Site Key Error

Hi Folks
when i enter v3 keys on my dev page i get this error:

Uncaught (in promise) Error: Invalid site key or not loaded in api.js: 6LdYus8aAAAAAGLcF8VcABbq_M9fLOE_s3aC-o-t
    at Array.<anonymous> (recaptcha__de.js:204)
    at recaptcha__de.js:207
    at r (index.js?ver=5.4.2:1)
    at index.js?ver=5.4.2:1

I checked the keys: they are activated for v3 and this domain @ google recaptcha

Greets

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