Pgadmin 4 fatal error : The pgAdmin 4 server could not be contacted

Installed version 13 on Windows 10 64-bit. When starting pgadmin 4, got
error. Tried 

1. to start as admin but no luck
2. uninstalled and installed again no luck
3. cleared C:\Users\xxx\AppData\Roaming\pgadmin contents but no luck

this is the error message I get when starting pgadmin 4

pgAdmin Runtime Environment
--------------------------------------------------------
Python Path: "D:\installed\PostgreSQL\13\pgAdmin 4\python\python.exe"
Runtime Config File:
"C:\Users\manju\AppData\Roaming\pgadmin\runtime_config.json"
pgAdmin Config File: "D:\installed\PostgreSQL\13\pgAdmin 4\web\config.py"
Webapp Path: "D:\installed\PostgreSQL\13\pgAdmin 4\web\pgAdmin4.py"
pgAdmin Command: "D:\installed\PostgreSQL\13\pgAdmin 4\python\python.exe -s
D:\installed\PostgreSQL\13\pgAdmin 4\web\pgAdmin4.py"
Environment: 
  - ALLUSERSPROFILE: C:\ProgramData
  - APPDATA: C:\Users\manju\AppData\Roaming
  - BONJOUR_SDK_HOME: D:\installed\Bonjour SDK\
  - CHROME_CRASHPAD_PIPE_NAME: \\.\pipe\crashpad_15772_XNAJSOZMZQFLWKIR
  - 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: VAISHNAV
  - ComSpec: C:\WINDOWS\system32\cmd.exe
  - DriverData: C:\Windows\System32\Drivers\DriverData
  - GRADLE_HOME: D:\installed\gradle-6.2.1-all\gradle-6.2.1
  - HADOOP_HOME: D:\hadoop
  - HOMEDRIVE: C:
  - HOMEPATH: \Users\manju
  - IntelliJ IDEA: D:\installed\JetBrains\IntelliJ IDEA 2019.3.3\bin;
  - IntelliJ IDEA Community Edition: D:\installed\JetBrains\IntelliJ IDEA
Community Edition 2019.3\bin;
  - JAVA_HOME: D:\installed\Java\jdk-13.0.1
  - LOCALAPPDATA: C:\Users\manju\AppData\Local
  - LOGONSERVER: \\VAISHNAV
  - MAVEN_HOME: D:\installed\apache-maven-3.6.3
  - NUMBER_OF_PROCESSORS: 8
  - OneDrive: C:\Users\manju\OneDrive
  - OneDriveConsumer: C:\Users\manju\OneDrive
  - OS: Windows_NT
  - Path:

D:\installed\oraclexe\app\oracle\product\11.2.0\server\bin;C:\oraclexe\app\oracle\product\11.2.0\server\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;D:\installed\Java\jdk-13.0.1\bin;D:\installed\Brackets\command;D:\installed\Microsoft
VS Code\bin;C:\Program Files (x86)\Windows Kits\10\Windows Performance

Toolkit\;D:\installed\sbt\bin;D:\hadoop\bin;D:\installed\gradle-6.2.1-all\gradle-6.2.1\bin;D:\installed\apache-maven-3.6.3\bin;C:\Program
Files\Intel\WiFi\bin\;C:\Program Files\Common
Files\Intel\WirelessCommon\;D:\installed\mongodb-win32-x86_64-windows-4.4.0\bin;D:\installed\Git\cmd;C:\Program
Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program
Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program
Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\;C:\Program Files
(x86)\Microsoft SQL Server\150\Tools\Binn\;C:\Program Files\Microsoft SQL
Server\150\Tools\Binn\;C:\Program Files\Microsoft SQL
Server\150\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL
Server\150\DTS\Binn\;C:\Program Files\Azure Data
Studio\bin;D:\installed\PostgreSQL\13\pgAdmin
4\bin;C:\Users\manju\AppData\Local\Microsoft\WindowsApps;D:\installed\JetBrains\IntelliJ
IDEA Community Edition 2019.3\bin;D:\installed\JetBrains\IntelliJ IDEA
2019.3.3\bin;C:\Users\manju\AppData\Local\Microsoft\WindowsApps
  - PATHEXT: .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
  - PGADMIN_INT_KEY: 69a422c9-47f9-468e-b3e0-64b91978eb5b
  - PGADMIN_INT_PORT: 50133
  - PGADMIN_SERVER_MODE: OFF
  - PROCESSOR_ARCHITECTURE: AMD64
  - PROCESSOR_IDENTIFIER: Intel64 Family 6 Model 142 Stepping 10,
GenuineIntel
  - PROCESSOR_LEVEL: 6
  - PROCESSOR_REVISION: 8e0a
  - 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;C:\Program
Files (x86)\Microsoft SQL Server\150\Tools\PowerShell\Modules\
  - PUBLIC: C:\Users\Public
  - SBT_HOME: D:\installed\sbt\
  - SystemDrive: C:
  - SystemRoot: C:\WINDOWS
  - TEMP: C:\Users\manju\AppData\Local\Temp
  - TMP: C:\Users\manju\AppData\Local\Temp
  - USERDOMAIN: VAISHNAV
  - USERDOMAIN_ROAMINGPROFILE: VAISHNAV
  - USERNAME: manju
  - USERPROFILE: C:\Users\manju
  - windir: C:\WINDOWS
--------------------------------------------------------

2021-05-17 12:58:42,013: INFO    pgadmin:
########################################################

2021-05-17 12:58:42,013: INFO    pgadmin:    Starting pgAdmin 4 v5.2...
2021-05-17 12:58:42,014: INFO    pgadmin:
########################################################
2021-05-17 12:58:42,014: DEBUG    pgadmin:    Python syspath:
['D:\\installed\\PostgreSQL\\13\\pgAdmin 4\\web',
'D:\\installed\\PostgreSQL\\13\\pgAdmin 4\\python\\python38.zip',
'D:\\installed\\PostgreSQL\\13\\pgAdmin 4\\python',
'D:\\installed\\PostgreSQL\\13\\pgAdmin 4\\python\\lib\\site-packages']

2021-05-17 12:58:42,016: DEBUG    pgadmin:    Available translations:
[Locale('cs'), Locale('de'), Locale('es'), Locale('fr'), Locale('it'),
Locale('ja'), Locale('ko'), Locale('pl'), Locale('ru'), Locale('zh')]

Traceback (most recent call last):
  File "D:\installed\PostgreSQL\13\pgAdmin 4\web\pgAdmin4.py", line 98, in
<module>
    app = create_app()
  File "D:\installed\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 "D:\installed\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'





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