Capture acoustic preamp

I’ve seen there have been a few captures of a Grace Audio Alix acoustic preamp posted on the app.
I have a FELiX preamp I’m trying to capture, it keeps stopping at the sanity check mark “no signal detected, signal too low”. Any thoughts?
It shows a very strong signal going into the input

What kind of cable are you connecting with?

Instrument cable into input 1
Instrument cable from capture out into channel 1 of the Felix