Adjusted piper download link for windows

software/source/server/services/tts/piper/tts.py

@@ -49,7 +49,7 @@ class Tts:
                     return
             elif OS == "Windows":
                 if ARCH == "AMD64":
-                    ARCH = "x64"
+                    ARCH = "amd64"
                 else:
                     print("Piper: unsupported architecture")
                     return
@@ -57,14 +57,15 @@ class Tts:
             PIPER_ASSETNAME = f"piper_{OS}_{ARCH}.tar.gz"
             PIPER_URL = "https://github.com/rhasspy/piper/releases/latest/download/"
 
-            if OS == "windows":
-                asset_url = f"{PIPER_URL}{PIPER_ASSETNAME}".replace(".tar.gz", ".zip")
+            asset_url = f"{PIPER_URL}{PIPER_ASSETNAME}"
+            if OS == "Windows":
+                asset_url = asset_url.replace(".tar.gz", ".zip")
 
             # Download and extract Piper
             urllib.request.urlretrieve(asset_url, os.path.join(PIPER_FOLDER_PATH, PIPER_ASSETNAME))
 
             # Extract the downloaded file
-            if OS == "windows":
+            if OS == "Windows":
                 import zipfile
                 with zipfile.ZipFile(os.path.join(PIPER_FOLDER_PATH, PIPER_ASSETNAME), 'r') as zip_ref:
                     zip_ref.extractall(path=PIPER_FOLDER_PATH)

software/source/server/utils/kernel.py

@@ -45,6 +45,10 @@ last_messages = ""
 
 def check_filtered_kernel():
     messages = get_kernel_messages()
+    if messages is None:
+        return ""  # Handle unsupported platform or error in fetching kernel messages
+
+    global last_messages
     messages.replace(last_messages, "")
     messages = messages.split("\n")