PgAdmin won't start

Hi,

I cannot run PgAdmin on Windows. It used to work, but stopped seemingly
without a reason.

The error is "The pgAdmin 4 server could not be contacted". I tried all
the solutions I found on SO (it seems to be quite a frequent error),

but none helped.

Below is the full message.

--------------------------------------------------------
Python Path: "C:\Users\jiri\AppData\Local\Programs\pgAdmin
4\v5\python\python.exe"
Runtime Config File:
"C:\Users\jiri\AppData\Roaming\pgadmin\runtime_config.json"
pgAdmin Config File: "C:\Users\jiri\AppData\Local\Programs\pgAdmin
4\v5\web\config.py"
Webapp Path: "C:\Users\jiri\AppData\Local\Programs\pgAdmin
4\v5\web\pgAdmin4.py"
pgAdmin Command: "C:\Users\jiri\AppData\Local\Programs\pgAdmin
4\v5\python\python.exe -s C:\Users\jiri\AppData\Local\Programs\pgAdmin
4\v5\web\pgAdmin4.py"
Environment:
  - AFCS_ASPOSE_APP_KEY: 871d7b08f1011a9dbad6540c423143e8
  - AFCS_ASPOSE_APP_SID: c9edffdb-40c1-4d16-bb72-036ffbcb1db9
  - AFCS_ConnectionString:
Host=p69.project-syndicate.org;Database=project-syndicate;Username=article_converter;Password=Eb%F5x56
  - ALLUSERSPROFILE: C:\ProgramData
  - APPDATA: C:\Users\jiri\AppData\Roaming
  - CHROME_CRASHPAD_PIPE_NAME: \\.\pipe\crashpad_23040_YFVWWAUTZLSUEEOW
  - CHROME_RESTART: NW.js|Whoa! NW.js has crashed. Relaunch
now?|LEFT_TO_RIGHT
  - CommonProgramFiles: C:\Program Files\Common Files
  - CommonProgramFiles(x86): C:\Program Files (x86)\Common Files
  - CommonProgramW6432: C:\Program Files\Common Files
  - COMPUTERNAME: DESKTOP-G7I32CC
  - ComSpec: C:\WINDOWS\system32\cmd.exe
  - DriverData: C:\Windows\System32\Drivers\DriverData
  - GIT_SSH: C:\Program Files\PuTTY\plink.exe
  - GOPATH: C:\Users\jiri\go
  - HOMEDRIVE: C:
  - HOMEPATH: \Users\jiri
  - LOCALAPPDATA: C:\Users\jiri\AppData\Local
  - LOGONSERVER: \\DESKTOP-G7I32CC
  - NUMBER_OF_PROCESSORS: 8
  - OneDrive: D:\OneDrive - Project Syndicate\OneDrive - The Project
Syndicate, o.p.s
  - OneDriveCommercial: D:\OneDrive - Project Syndicate\OneDrive - The
Project Syndicate, o.p.s
  - OS: Windows_NT
  - Path:
C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program
Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files\Microsoft
SQL Server\Client SDK\ODBC\170\Tools\Binn\;C:\Program
Files\PuTTY\;C:\Program Files\TortoiseSVN\bin;C:\Program Files
(x86)\Gpg4win\..\GnuPG\bin;C:\Program Files\Git\cmd;C:\Program
Files\Go\bin;C:\Program Files\dotnet\;C:\Program
Files\Docker\Docker\resources\bin;C:\ProgramData\DockerDesktop\version-bin;C:\Python27;C:\Users\jiri\AppData\Local\Microsoft\WindowsApps;C:\Users\jiri\AppData\Local\Programs\Microsoft
VS Code\bin;C:\Program
Files\liquibase;C:\msys64\usr\bin;C:\msys64\mingw64\bin;C:\Users\jiri\go\bin;C:\Users\jiri\.dotnet\tools
  - PATHEXT: .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
  - PGADMIN_INT_KEY: 376bd0e7-5ac9-4ebd-ba93-0f3f364faaad
  - PGADMIN_INT_PORT: 49537
  - PGADMIN_SERVER_MODE: OFF
  - PROCESSOR_ARCHITECTURE: AMD64
  - PROCESSOR_IDENTIFIER: AMD64 Family 23 Model 17 Stepping 0, AuthenticAMD
  - PROCESSOR_LEVEL: 23
  - PROCESSOR_REVISION: 1100
  - ProgramData: C:\ProgramData
  - ProgramFiles: C:\Program Files
  - ProgramFiles(x86): C:\Program Files (x86)
  - ProgramW6432: C:\Program Files
  - PSModulePath: C:\Program
Files\WindowsPowerShell\Modules;C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules
  - PUBLIC: C:\Users\Public
  - SERINUMB: DA428419
  - SESSIONNAME: Console
  - SVN_SSH: C:\Program Files\PuTTY\plink.exe
  - SystemDrive: C:
  - SystemRoot: C:\WINDOWS
  - TEMP: C:\Users\jiri\AppData\Local\Temp
  - TMP: C:\Users\jiri\AppData\Local\Temp
  - USERDOMAIN: DESKTOP-G7I32CC
  - USERDOMAIN_ROAMINGPROFILE: DESKTOP-G7I32CC
  - USERNAME: jiri
  - USERPROFILE: C:\Users\jiri
  - WBSET: Done
  - windir: C:\WINDOWS
  - WIX: C:\Program Files (x86)\WiX Toolset v3.11\
  - __COMPAT_LAYER: DetectorsAppHealth
--------------------------------------------------------

2021-11-23 14:29:32,026: WARNING    werkzeug:    WebSocket transport not
available. Install simple-websocket for improved performance.

NOTE: Configuring authentication for DESKTOP mode.
pgAdmin 4 - Application Initialisation
======================================

 * Serving Flask app "pgadmin" (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production
deployment.
   Use a production WSGI server instead.
 * Debug mode: off

2021-11-23 14:29:32,026: WARNING    werkzeug:    WebSocket transport not
available. Install simple-websocket for improved performance.