Dear PGAdmin Support, We are currently rolling out and configuring PGAdmin 4 v9.14 on stepping stones running x64 Windows 2022 Server and x64 Windows 2025 Server but the software simply will not start up.
We have done most of the basic stuff like installing and running the software with administrative rights, and tried it with the virus scanner and windows firewall disabled. We get the following error at startup: pgAdmin Runtime Environment -------------------------------------------------------- Python Path: "C:\Program Files\pgAdmin 4\python\python.exe" Runtime Config File: "C:\Users\adminalano\AppData\Roaming\pgadmin4\config.json" Webapp Path: "C:\Program Files\pgAdmin 4\web\pgAdmin4.py" pgAdmin Command: "C:\Program Files\pgAdmin 4\python\python.exe -s C:\Program Files\pgAdmin 4\web\pgAdmin4.py" Environment: - ALLUSERSPROFILE: C:\ProgramData - APPDATA: C:\Users\adminalano\AppData\Roaming - CLIENTNAME: SYS42992 - CommonProgramFiles: C:\Program Files\Common Files - CommonProgramFiles(x86): C:\Program Files (x86)\Common Files - CommonProgramW6432: C:\Program Files\Common Files - COMPUTERNAME: ASP056 - ComSpec: C:\WINDOWS\system32\cmd.exe - DriverData: C:\Windows\System32\Drivers\DriverData - EFC_1836_1592913036: 1 - EFC_1836_2283032206: 0 - ELECTRON_ENABLE_SECURITY_WARNINGS: false - FPS_BROWSER_APP_PROFILE_STRING: Internet Explorer - FPS_BROWSER_USER_PROFILE_STRING: Default - HOMEDRIVE: C: - HOMEPATH: \Users\adminalano - LOCALAPPDATA: C:\Users\adminalano\AppData\Local - LOGONSERVER: \\DC13 - NUMBER_OF_PROCESSORS: 4 - OS: Windows_NT - Path: C:\Program Files\pgAdmin 4\runtime;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Users\adminalano\AppData\Local\Microsoft\WindowsApps; - PATHEXT: .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC - PGADMIN_INT_KEY: a95817d4-1b0b-40e8-a76e-6f07bbfe05ec - PGADMIN_INT_PORT: 24575 - PGADMIN_SERVER_MODE: OFF - PROCESSOR_ARCHITECTURE: AMD64 - PROCESSOR_IDENTIFIER: Intel64 Family 6 Model 79 Stepping 0, GenuineIntel - PROCESSOR_LEVEL: 6 - PROCESSOR_REVISION: 4f00 - 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 - PYTHONDONTWRITEBYTECODE: 1 - SESSIONNAME: RDP-Tcp#0 - SystemDrive: C: - SystemRoot: C:\WINDOWS - TEMP: C:\Users\ADMINA~2\AppData\Local\Temp\15 - TMP: C:\Users\ADMINA~2\AppData\Local\Temp\15 - USERDNSDOMAIN: RET.ROTTERDAM.NL - USERDOMAIN: RET2005 - USERDOMAIN_ROAMINGPROFILE: RET2005 - USERNAME: adminalano - USERPROFILE: C:\Users\adminalano - windir: C:\WINDOWS -------------------------------------------------------- Total spawn time to start the pgAdmin4 server: 0.008 Sec NOTE: Configuring authentication for DESKTOP mode. pgAdmin 4 - Application Initialisation ====================================== 2026-05-21 08:05:54,151: WARNING werkzeug: Werkzeug appears to be used in a production deployment. Consider switching to a production web server instead. * Serving Flask app 'pgadmin' * Debug mode: off The pgadmin4.log has the following entries: 2026-05-21 08:03:16,432: WARNING werkzeug: Werkzeug appears to be used in a production deployment. Consider switching to a production web server instead. 2026-05-21 08:03:55,326: WARNING werkzeug: Werkzeug appears to be used in a production deployment. Consider switching to a production web server instead. 2026-05-21 08:05:54,151: WARNING werkzeug: Werkzeug appears to be used in a production deployment. Consider switching to a production web server instead. Deleting the pgadmin4.db file and restarting did not help either. Could you tell me how to resolve this issue, because we are at a complete loss over this? Kind Regards, Aldo Lanooij Database Beheerder | IT Services RET Laan op Zuid 2 | Postbus 112 | 3000 AC Rotterdam 📱 0638520450🌐 www.ret.nl<https://www.ret.nl> | X @RETRotterdam<https://twitter.com/RETRotterdam> ________________________________ Deze email en eventuele bijlagen zijn vertrouwelijk en alleen bestemd voor de geadresseerde(n). Openbaarmaking, vermenigvuldiging, verspreiding en / of verstrekking van deze informatie aan derden is, behoudens schriftelijke toestemming van de afzender, niet toegestaan. RET N.V. sluit iedere aansprakelijkheid uit in verband met het gebruik van elektronische verzending. Indien dit e- mailbericht niet voor u is bestemd, wordt u vriendelijk doch dringend verzocht dit bericht en eventuele kopieën daarvan te verwijderen en te vernietigen en de systeembeheerder via [email protected] te waarschuwen. Deze email is gecontroleerd op aanwezigheid van virussen. RET N.V. RET N.V. is ingeschreven bij de KvK onder nr. 24292838. RET Bus B.V. is ingeschreven bij de KvK onder nr. 54322847. RET Services B.V. is ingeschreven bij de KvK onder nr. 24316209
