Error: Prepare Failed. Error That indicates preparation Failed.

[Zakariya5567]

I am running the Sample Test App. The create session was done got the token, App account is verified now.
But getting this error when clicking on "Start TTP Preparation"
Error: Prepare Failed. Error That indicates preparation Failed.

do {
try await fiservTTPCardReader.initializeSession()
print("Session Initialized Successfully")
} catch {
print("Initialize the Card Reader Session Failed: (error.localizedDescription)")

        return
    }