Installation Fails Due to UTF-8 Encoding Error and Application Does Not Automatically Launch WebView After Server Start

[AmesianX]

UTF-8 Error

When the installation starts, the server crashes due to a UTF-8 encoding error. So I manually modified the following file to make the server run properly without any errors.

Log

Installed Python Version: Python 3.11.11
"C:\Users\user\AppData\Roaming\Open WebUI\python\Scripts\activate.bat" && uvicorn open_webui.main:app --host "127.0.0.1" --forwarded-allow-ips '*' --port 8081
Starting Open-WebUI server...
Server started with PID: 23932
INFO [alembic.runtime.migration] Context impl SQLiteImpl.
INFO [alembic.runtime.migration] Will assume non-transactional DDL.
INFO [open_webui.env] 'DEFAULT_LOCALE' loaded from the latest database entry
INFO [open_webui.env] 'DEFAULT_PROMPT_SUGGESTIONS' loaded from the latest database entry
WARNI [open_webui.env]

WARNING: CORS_ALLOW_ORIGIN IS SET TO '*' - NOT RECOMMENDED FOR PRODUCTION DEPLOYMENTS.
INFO [open_webui.env] Embedding model set: sentence-transformers/all-MiniLM-L6-v2
WARNI [langchain_community.utils.user_agent] USER_AGENT environment variable not set, consider setting it to identify your requests.
C:\Users\user\AppData\Roaming\Open WebUI\python\Lib\site-packages\open_webui
C:\Users\user\AppData\Roaming\Open WebUI\python\Lib\site-packages
C:\Users\user\AppData\Roaming\Open WebUI\python\Lib

ERROR UTF-8 encoding error

██████╗ ██████╗ ███████╗███╗ ██╗ ██╗ ██╗███████╗██████╗ ██╗ ██╗██╗
██╔═══██╗██╔══██╗██╔════╝████╗ ██║ ██║ ██║██╔════╝██╔══██╗██║ ██║██║
██║ ██║██████╔╝█████╗ ██╔██╗ ██║ ██║ █╗ ██║█████╗ ██████╔╝██║ ██║██║
██║ ██║██╔═══╝ ██╔══╝ ██║╚██╗██║ ██║███╗██║██╔══╝ ██╔══██╗██║ ██║██║
╚██████╔╝██║ ███████╗██║ ╚████║ ╚███╔███╔╝███████╗██████╔╝╚██████╔╝██║
╚═════╝ ╚═╝ ╚══════╝╚═╝ ╚═══╝ ╚══╝╚══╝ ╚══════╝╚═════╝ ╚═════╝ ╚═╝

v0.6.0 - building the best open-source AI user interface.

https://github.com/open-webui/open-webui
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INFO: Started server process [32780]
INFO: Waiting for application startup.
2025-04-03 18:35:38.014 | INFO | open_webui.utils.logger:start_logger:140 - GLOBAL_LOG_LEVEL: INFO - {}

My Ugly SOLUTION [c:\Users\xxx\AppData\Roaming\Open WebUI\python\Lib\site-packages\open_webui\main.py]

import asyncio
import inspect
import json
import logging
import mimetypes
import os
import shutil
import sys
import time
import random

# start ugly solution
import io
sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding='utf-8')
# end

from contextlib import asynccontextmanager
from urllib.parse import urlencode, parse_qs, urlparse
from pydantic import BaseModel
from sqlalchemy import text

ISSUE

However, after the server starts, I believe it should automatically open a WebView (or similar) that connects to the local server.
But instead, it just stays running without doing anything.
If I manually open a browser and go to localhost:8080, everything works fine.
But if I understand the purpose of this desktop application correctly, shouldn’t it open the interface inside the application window itself after installation, just like Claude Desktop or LM Studio?

[mazenhassan9]

I have the same error, did you find any way to fix this issue?