Package "react-native-purchases" does not contain a valid config plugin.

Hi guys, 

I am new here:)

I am working in expo managed workflow, building an ios app.

I installed the react-native-purchases through yarn (version 8.5.1). 

I try to do my eas build in development (works in the past).

after a few seconds, I get this error that prevents the build? what am I doing wrong? 

“Package "react-native-purchases" does not contain a valid config plugin.”

Thank you!!

M

(P.s. I tried multiple versions but nothing works)