diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 8905c13..58819c1 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -66,7 +66,7 @@ jobs:
           python -m pip install ".[test]"
       - name: Set development API_URL for non-main branches
         if: github.ref != 'refs/heads/main'
-        run: echo "API_URL=https://api.rouast.com/vitallens-dev" >> $GITHUB_ENV
+        run: echo "API_URL=https://api.rouast.com/vitallens-dev" | Out-File -FilePath $env:GITHUB_ENV -Append
       - name: Lint with flake8
         run: |
           flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
diff --git a/tests/test_vitallens.py b/tests/test_vitallens.py
index 2b5531a..f1ceb85 100644
--- a/tests/test_vitallens.py
+++ b/tests/test_vitallens.py
@@ -90,7 +90,7 @@ def create_mock_api_response(
           "ppg_waveform": {"data": np.random.rand(video.shape[0]).tolist(), "unit": "unitless", "confidence": np.ones(video.shape[0]).tolist(), "note": "Note"},
           "respiratory_waveform": {"data": np.random.rand(video.shape[0]).tolist(), "unit": "unitless", "confidence": np.ones(video.shape[0]).tolist(), "note": "Note"}},
         "face": {"confidence": np.random.rand(video.shape[0]).tolist(), "note": "Note"},
-        "state": {"data": np.zeros((2, 128), dtype=np.float32).tolist(), "note": "Note"},
+        "state": {"data": np.zeros((256,), dtype=np.float32).tolist(), "note": "Note"},
         "message": "Message"})
 
 @pytest.mark.parametrize("file", [True, False])
@@ -167,7 +167,7 @@ def test_VitalLens_API_valid_response(request, process_signals, n_frames):
   live = np.asarray(response_body["face"]["confidence"])
   assert live.shape == (n_frames,)
   state = np.asarray(response_body["state"]["data"])
-  assert state.shape == (2, 128)
+  assert state.shape == (256,)
 
 def test_VitalLens_API_wrong_api_key(request):
   config = load_config("vitallens.yaml")
@@ -194,4 +194,4 @@ def test_VitalLens_API_no_parseable_video(request):
   headers = {"x-api-key": api_key}
   payload = {"video": "not_parseable"}
   response = requests.post(API_URL, headers=headers, json=payload)
-  assert response.status_code == 400
+  assert response.status_code == 422
diff --git a/vitallens/methods/vitallens.py b/vitallens/methods/vitallens.py
index 41a4d27..805f1c9 100644
--- a/vitallens/methods/vitallens.py
+++ b/vitallens/methods/vitallens.py
@@ -255,7 +255,11 @@ def process_api_batch(
       elif response.status_code == 429:
         raise VitalLensAPIQuotaExceededError()
       elif response.status_code == 400:
-        raise VitalLensAPIError("Error occurred in the API. Message: {}".format(response_body['message']))
+        raise VitalLensAPIError("Parameters missing: {}".format(response_body['message']))
+      elif response.status_code == 422:
+        raise VitalLensAPIError("Issue with provided parameters: {}".format(response_body['message']))
+      elif response.status_code == 500:
+        raise VitalLensAPIError("Error occurred in the API: {}".format(response_body['message']))
       else:
         raise Exception("Error {}: {}".format(response.status_code, response_body['message']))
     # Parse response