How to Fix “Failed to Open the Runspace Pool” Error in Server Manager WinRM Plug-in?. The Server Manager WinRM plug-in might be corrupted or missing.
Solution 1
1. Run Windows PowerShell as Administrator;
2. Type the next command:
netsh http show iplistNOTE: If you only see your LAN IP Address, then your issue is that http.sys isn’t listening to your local loopback address (127.0.0.1).
3. To add your local loopback address, run this:
netsh http add iplisten 127.0.0.1If you’re using IPv6, then you can run this command as well:
netsh http add iplisten ::1After running these commands restart your server.
Solution 2
It appears that WinRM/WSMAN configuration has to be reset to default values. So copying HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN registry settings from the fresh Win 2012 R2 install to the problem machine eliminates this error.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN]
"StackVersion"="2.0"
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\AutoRestartList]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\CertMapping]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\Client]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\Listener]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\Listener\*+HTTP]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\Plugin]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\Plugin\Event Forwarding Plugin]
"ConfigXML"=""
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\Plugin\Microsoft.PowerShell]
"ConfigXML"=" "
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\Plugin\Microsoft.PowerShell.Workflow]
"ConfigXML"=" "
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\Plugin\Microsoft.PowerShell32]
"ConfigXML"=" "
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\Plugin\Microsoft.Windows.ServerManagerWorkflows]
"ConfigXML"=" "
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\Plugin\SEL Plugin]
"ConfigXML"=" "
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\Plugin\WMI Provider]
"ConfigXML"=""
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\SafeClientList]
"WSManSafeClientList"=hex:00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,01
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\Service]
"allow_remote_requests"=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\WinRS]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMAN\WinRS\CustomRemoteShell]
