Hi We have figured out the issue, it is because of the latest version of the 'itsdangerous' python package which was released on 12th May. We are working on fixing the issue with EDB Installers.
Meanwhile, you can perform the following steps: 1. Take a backup of your 'pgadmin4.db' file which is present at the "%APPDATA%\Roaming\pgadmin" folder. 2. Delete 'pgadmin4.db' file. 3. Download pgAdmin4 v5.2 from https://www.postgresql.org/ftp/pgadmin/pgadmin4/v5.2/windows/ 4. Install and Launch 'pgAdmin4 v5'. On Tue, May 18, 2021 at 3:47 PM pedro emmanuel acosta rodriguez < agm.pedroaco...@gmail.com> wrote: > > pgAdmin Runtime Environment > -------------------------------------------------------- > Python Path: "C:\Program Files\PostgreSQL\13\pgAdmin 4\python\python.exe" > Runtime Config File: > "C:\Users\EMMANUEL\AppData\Roaming\pgadmin\runtime_config.json" > pgAdmin Config File: "C:\Program Files\PostgreSQL\13\pgAdmin > 4\web\config.py" > Webapp Path: "C:\Program Files\PostgreSQL\13\pgAdmin 4\web\pgAdmin4.py" > pgAdmin Command: "C:\Program Files\PostgreSQL\13\pgAdmin > 4\python\python.exe -s C:\Program Files\PostgreSQL\13\pgAdmin > 4\web\pgAdmin4.py" > Environment: > - ADSK_CLM_WPAD_PROXY_CHECK: FALSE > - ALLUSERSPROFILE: C:\ProgramData > - APPDATA: C:\Users\EMMANUEL\AppData\Roaming > - CHROME_CRASHPAD_PIPE_NAME: \\.\pipe\crashpad_10760_WAARUWBDWJCNQKIW > - 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 > - COMPLUS_ApplicationMigrationRuntimeActivationConfigPath: > C:\Autodesk\Autodesk_AutoCAD_2015_to_2018_Geolocation_Online_Maps_Hotfix > - COMPUTERNAME: MSI > - ComSpec: C:\WINDOWS\system32\cmd.exe > - configsetroot: C:\WINDOWS\ConfigSetRoot > - DriverData: C:\Windows\System32\Drivers\DriverData > - FPS_BROWSER_APP_PROFILE_STRING: Internet Explorer > - FPS_BROWSER_USER_PROFILE_STRING: Default > - GDAL_DATA: C:\Program Files\PostgreSQL\13\gdal-data > - HOMEDRIVE: C: > - HOMEPATH: \Users\EMMANUEL > - LOCALAPPDATA: C:\Users\EMMANUEL\AppData\Local > - LOGONSERVER: \\MSI > - NUMBER_OF_PROCESSORS: 8 > - OneDrive: C:\Users\EMMANUEL\OneDrive - Ministerio de la Presidencia > - OneDriveCommercial: C:\Users\EMMANUEL\OneDrive - Ministerio de la > Presidencia > - OneDriveConsumer: C:\Users\EMMANUEL\OneDrive > - OS: Windows_NT > - Path: C:\Program Files (x86)\Intel\iCLS Client\;C:\Program > Files\Intel\iCLS > Client\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program > Files (x86)\NVIDIA > Corporation\PhysX\Common;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program > Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program > Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files > (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program > Files\Intel\Intel(R) Management Engine > Components\IPT;C:\HashiCorp\Vagrant\bin;C:\Program Files\Microsoft SQL > Server\120\Tools\Binn\;C:\Program Files\Common Files\Autodesk > Shared\;C:\Program Files > (x86)\Boundless\OpenGeo\bin;C:\Users\EMMANUEL\AppData\Local\Microsoft\WindowsApps;D:\base > de datos\scr;C:\Users\EMMANUEL\AppData\Local\Programs\Microsoft VS Code\bin > - PATHEXT: .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC > - PGADMIN_INT_KEY: 2104502e-8085-44db-9fe8-7a356bf334f6 > - PGADMIN_INT_PORT: 5546 > - PGADMIN_SERVER_MODE: OFF > - POSTGIS_ENABLE_OUTDB_RASTERS: 1 > - POSTGIS_GDAL_ENABLED_DRIVERS: GTiff PNG JPEG GIF XYZ DTED USGSDEM > AAIGrid > - PROCESSOR_ARCHITECTURE: AMD64 > - PROCESSOR_IDENTIFIER: Intel64 Family 6 Model 158 Stepping 9, > GenuineIntel > - PROCESSOR_LEVEL: 6 > - PROCESSOR_REVISION: 9e09 > - ProgramData: C:\ProgramData > - ProgramFiles: C:\Program Files > - ProgramFiles(x86): C:\Program Files (x86) > - ProgramW6432: C:\Program Files > - PROJ_LIB: C:\Program Files\PostgreSQL\13\share\contrib\postgis-3.1\proj > - PSModulePath: C:\Program > Files\WindowsPowerShell\Modules;C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules > - PUBLIC: C:\Users\Public > - SESSIONNAME: Console > - SystemDrive: C: > - SystemRoot: C:\WINDOWS > - TEMP: C:\Users\EMMANUEL\AppData\Local\Temp > - TMP: C:\Users\EMMANUEL\AppData\Local\Temp > - USERDOMAIN: MSI > - USERDOMAIN_ROAMINGPROFILE: MSI > - USERNAME: EMMANUEL > - USERPROFILE: C:\Users\EMMANUEL > - VBOX_MSI_INSTALL_PATH: C:\Program Files\Oracle\VirtualBox\ > - windir: C:\WINDOWS > -------------------------------------------------------- > > Traceback (most recent call last): > File "C:\Program Files\PostgreSQL\13\pgAdmin 4\web\pgAdmin4.py", line > 98, in <module> > app = create_app() > File "C:\Program Files\PostgreSQL\13\pgAdmin 4\web\pgadmin\__init__.py", > line 347, in create_app > if not os.path.exists(SQLITE_PATH) or get_version() == -1: > File "C:\Program Files\PostgreSQL\13\pgAdmin > 4\web\pgadmin\setup\db_version.py", line 19, in get_version > return version.value > AttributeError: 'NoneType' object has no attribute 'value' > > -- > DIOS TE BENDIGA Y LLENE DE BENDICIONES A LOS TUYOS > > [image: Mailtrack] > <https://mailtrack.io?utm_source=gmail&utm_medium=signature&utm_campaign=signaturevirality5&> > Remitente > notificado con > Mailtrack > <https://mailtrack.io?utm_source=gmail&utm_medium=signature&utm_campaign=signaturevirality5&> > 17/05/21 > 13:37:29 > -- *Thanks & Regards* *Akshay Joshi* *pgAdmin Hacker | Principal Software Architect* *EDB Postgres <http://edbpostgres.com>* *Mobile: +91 976-788-8246*