How to solve invalidContext code 12

[Jounes]

Hello,
I'm working on an Android App using cap 3.9 and am recieving verification Error 12 (invalidContext) upon calling isAvailable. I'm not that well versed in Android Development so I'm not sure how to solve the problem. My Device has Face Authentification enabled. When emulating a comparable device in Android Studio the call works however and I can request biometric authentification in the form of a fingerprint.

Has anyone come across thes problem? I followed the installing instruction and suspect it has something to do with my setup.

Thanks in advance