diff --git a/GUI.py b/GUI.py
index 90e37ae..bc41838 100644
--- a/GUI.py
+++ b/GUI.py
@@ -1,6 +1,7 @@
 # Import the server module
 import http.server
 import webbrowser
+
 # Set the hostname
 HOST = "localhost"
 # Set the port number
@@ -9,15 +10,16 @@ PORT = 4000
 # Define class to display the index page of the web server
 class PythonServer(http.server.SimpleHTTPRequestHandler):
     def do_GET(self):
-        if self.path == '/GUI':
-            self.path = 'index.html'
+        if self.path == "/GUI":
+            self.path = "index.html"
         return http.server.SimpleHTTPRequestHandler.do_GET(self)
 
+
 # Declare object of the class
 webServer = http.server.HTTPServer((HOST, PORT), PythonServer)
 # Print the URL of the webserver, new =2 opens in a new tab
 print(f"Server started at http://{HOST}:{PORT}/GUI/")
-webbrowser.open(f'http://{HOST}:{PORT}/GUI/', new = 2)
+webbrowser.open(f"http://{HOST}:{PORT}/GUI/", new=2)
 print("Website opened in new tab")
 print("Press Ctrl+C to quit")
 try:
@@ -27,4 +29,4 @@ except KeyboardInterrupt:
     # Stop the web server
     webServer.server_close()
     print("The server is stopped.")
-    exit()
\ No newline at end of file
+    exit()
diff --git a/TTS/pyttsx.py b/TTS/pyttsx.py
index 06d27c5..b5ffb29 100644
--- a/TTS/pyttsx.py
+++ b/TTS/pyttsx.py
@@ -19,9 +19,7 @@ class pyttsx:
         if voice_id == "" or voice_num == "":
             voice_id = 2
             voice_num = 3
-            raise ValueError(
-                "set pyttsx values to a valid value, switching to defaults"
-            )
+            raise ValueError("set pyttsx values to a valid value, switching to defaults")
         else:
             voice_id = int(voice_id)
             voice_num = int(voice_num)
diff --git a/main.py b/main.py
index 7e0ef02..8a0755d 100755
--- a/main.py
+++ b/main.py
@@ -40,6 +40,7 @@ print_markdown(
 )
 checkversion(__VERSION__)
 
+
 def main(POST_ID=None):
     reddit_object = get_subreddit_threads(POST_ID)
     global redditid
diff --git a/reddit/subreddit.py b/reddit/subreddit.py
index 716a7fa..11b93af 100644
--- a/reddit/subreddit.py
+++ b/reddit/subreddit.py
@@ -1,5 +1,7 @@
 import re
 
+from prawcore.exceptions import ResponseException
+
 from utils import settings
 import praw
 from praw.models import MoreComments
@@ -29,14 +31,21 @@ def get_subreddit_threads(POST_ID: str):
     username = settings.config["reddit"]["creds"]["username"]
     if str(username).casefold().startswith("u/"):
         username = username[2:]
-    reddit = praw.Reddit(
-        client_id=settings.config["reddit"]["creds"]["client_id"],
-        client_secret=settings.config["reddit"]["creds"]["client_secret"],
-        user_agent="Accessing Reddit threads",
-        username=username,
-        passkey=passkey,
-        check_for_async=False,
-    )
+    try:
+        reddit = praw.Reddit(
+            client_id=settings.config["reddit"]["creds"]["client_id"],
+            client_secret=settings.config["reddit"]["creds"]["client_secret"],
+            user_agent="Accessing Reddit threads",
+            username=username,
+            passkey=passkey,
+            check_for_async=False,
+        )
+    except ResponseException as e:
+        match e.response.status_code:
+            case 401:
+                print("Invalid credentials - please check them in config.toml")
+    except:
+        print("Something went wrong...")
 
     # Ask user for subreddit input
     print_step("Getting subreddit threads...")
@@ -57,9 +66,7 @@ def get_subreddit_threads(POST_ID: str):
         subreddit_choice = sub
         if str(subreddit_choice).casefold().startswith("r/"):  # removes the r/ from the input
             subreddit_choice = subreddit_choice[2:]
-        subreddit = reddit.subreddit(
-            subreddit_choice
-        )  # Allows you to specify in .env. Done for automation purposes.
+        subreddit = reddit.subreddit(subreddit_choice)
 
     if POST_ID:  # would only be called if there are multiple queued posts
         submission = reddit.submission(id=POST_ID)
diff --git a/utils/console.py b/utils/console.py
index 1518c27..6f99a41 100644
--- a/utils/console.py
+++ b/utils/console.py
@@ -118,4 +118,3 @@ def handle_input(
         console.print(
             "[red bold]" + err_message + "\nValid options are: " + ", ".join(map(str, options)) + "."
         )
-        
diff --git a/utils/version.py b/utils/version.py
index 3042c0c..a8177cc 100644
--- a/utils/version.py
+++ b/utils/version.py
@@ -1,11 +1,16 @@
 import requests
 from utils.console import print_step
 
+
 def checkversion(__VERSION__):
-    response = requests.get("https://api.github.com/repos/elebumm/RedditVideoMakerBot/releases/latest")
-    latestversion = (response.json()["tag_name"])
+    response = requests.get(
+        "https://api.github.com/repos/elebumm/RedditVideoMakerBot/releases/latest"
+    )
+    latestversion = response.json()["tag_name"]
     if __VERSION__ == latestversion:
         print_step(f"You are using the newest version ({__VERSION__}) of the bot")
         return True
     else:
-        print_step(f"You are using an older version ({__VERSION__}) of the bot. Download the newest version ({latestversion}) from https://github.com/elebumm/RedditVideoMakerBot/releases/latest")
\ No newline at end of file
+        print_step(
+            f"You are using an older version ({__VERSION__}) of the bot. Download the newest version ({latestversion}) from https://github.com/elebumm/RedditVideoMakerBot/releases/latest"
+        )