### What this PR does / why we need it? Corrects the attribute access for retrieving the device from `q_a_proj` to `q_proj`. This prevents an `AttributeError` as `q_a_proj` does not exist on the class instance. ### Does this PR introduce _any_ user-facing change? None. ### How was this patch tested? Need MLAPO tests. Signed-off-by: Yizhou Liu <liu_yizhou@outlook.com>