diff --git a/frigate/config/env.py b/frigate/config/env.py
index e4e6842cb..0a9b92e8f 100644
--- a/frigate/config/env.py
+++ b/frigate/config/env.py
@@ -23,7 +23,7 @@ EnvString = Annotated[str, AfterValidator(validate_env_string)]
 
 def validate_env_vars(v: dict[str, str], info: ValidationInfo) -> dict[str, str]:
     if isinstance(info.context, dict) and info.context.get("install", False):
-        for k, v in v:
+        for k, v in v.items():
             os.environ[k] = v
 
     return v
diff --git a/frigate/detectors/plugins/rocm.py b/frigate/detectors/plugins/rocm.py
index 655973dfd..60118d129 100644
--- a/frigate/detectors/plugins/rocm.py
+++ b/frigate/detectors/plugins/rocm.py
@@ -98,9 +98,7 @@ class ROCmDetector(DetectionApi):
         else:
             logger.info(f"AMD/ROCm: loading model from {path}")
 
-            if path.endswith(".onnx"):
-                self.model = migraphx.parse_onnx(path)
-            elif (
+            if (
                 path.endswith(".tf")
                 or path.endswith(".tf2")
                 or path.endswith(".tflite")
@@ -108,7 +106,7 @@ class ROCmDetector(DetectionApi):
                 # untested
                 self.model = migraphx.parse_tf(path)
             else:
-                raise Exception(f"AMD/ROCm: unknown model format {path}")
+                self.model = migraphx.parse_onnx(path)
 
             logger.info("AMD/ROCm: compiling the model")
 
diff --git a/frigate/util/config.py b/frigate/util/config.py
index 729215e9e..a9a9666d9 100644
--- a/frigate/util/config.py
+++ b/frigate/util/config.py
@@ -29,6 +29,10 @@ def migrate_frigate_config(config_file: str):
     with open(config_file, "r") as f:
         config: dict[str, dict[str, any]] = yaml.load(f)
 
+    if config is None:
+        logger.error(f"Failed to load config at {config_file}")
+        return
+
     previous_version = str(config.get("version", "0.13"))
 
     if previous_version == CURRENT_CONFIG_VERSION: