I have a release pipeline in Azure Devops that without any changes stop working. The task where my pipeline fails is a "IIS web app manage" task, where I do a AppPool stop

The error that I get is
Exit code 1 returned from process: file name 'C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe', arguments '-NoLogo -Sta -NoProfile -NonInteractive -ExecutionPolicy Unrestricted -Command ". ([scriptblock]::Create('if ([Console]::InputEncoding -is [Text.UTF8Encoding] -and [Console]::InputEncoding.GetPreamble().Length -ne 0) { [Console]::InputEncoding = New-Object Text.UTF8Encoding $false } if (!$PSHOME) { $null = Get-Item -LiteralPath ''variable:PSHOME'' } else { Import-Module -Name ([System.IO.Path]::Combine($PSHOME, ''Modules\Microsoft.PowerShell.Management\Microsoft.PowerShell.Management.psd1'')) ; Import-Module -Name ([System.IO.Path]::Combine($PSHOME, ''Modules\Microsoft.PowerShell.Utility\Microsoft.PowerShell.Utility.psd1'')) }')) 2>&1 | ForEach-Object { Write-Verbose $_.Exception.Message -Verbose } ; Import-Module -Name 'C:\azagent\A3\_work\_tasks\IISWebAppManagementOnMachineGroup_1b2aec60-dc49-11e6-9b76-63056e018cac\0.5.15\ps_modules\VstsTaskSdk\VstsTaskSdk.psd1' -ArgumentList @{ NonInteractive = $true } -ErrorAction Stop ; $VerbosePreference = 'SilentlyContinue' ; $DebugPreference = 'SilentlyContinue' ; Invoke-VstsTaskScript -ScriptBlock ([scriptblock]::Create('. ''C:\azagent\A3\_work\_tasks\IISWebAppManagementOnMachineGroup_1b2aec60-dc49-11e6-9b76-63056e018cac\0.5.15\IISWebAppManagementOnMachineGroup.ps1'''))"'.
But the interessting thing is that the App pool is stopped and the pipeline works fine until 2 days ago. No changes on the pipeline and on the destination folder. Recreated also the tragets in the deployment groups.
Thanks for any hint.
##UPDATE: LOGS
2021-09-29T15:43:11.3350887Z ##[section]Starting: Stop IIS
2021-09-29T15:43:11.3523223Z ==============================================================================
2021-09-29T15:43:11.3523551Z Task : IIS web app manage
2021-09-29T15:43:11.3523878Z Description : Create or update websites, web apps, virtual directories, or application pools
2021-09-29T15:43:11.3524171Z Version : 0.5.15
2021-09-29T15:43:11.3524416Z Author : Microsoft Corporation
2021-09-29T15:43:11.3524782Z Help : https://docs.microsoft.com/azure/devops/pipelines/tasks/deploy/iis-web-app-management-on-machine-group
2021-09-29T15:43:11.3525169Z ==============================================================================
2021-09-29T15:43:15.0041212Z ##[command]"C:\Windows\system32\inetsrv\appcmd.exe" stop apppool /apppool.name:"MYHOST"
2021-09-29T15:43:15.0731119Z "MYHOST" successfully stopped
2021-09-29T15:43:15.1615455Z ##[error]Exit code 1 returned from process: file name 'C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe', arguments '-NoLogo -Sta -NoProfile -NonInteractive -ExecutionPolicy Unrestricted -Command ". ([scriptblock]::Create('if ([Console]::InputEncoding -is [Text.UTF8Encoding] -and [Console]::InputEncoding.GetPreamble().Length -ne 0) { [Console]::InputEncoding = New-Object Text.UTF8Encoding $false } if (!$PSHOME) { $null = Get-Item -LiteralPath ''variable:PSHOME'' } else { Import-Module -Name ([System.IO.Path]::Combine($PSHOME, ''Modules\Microsoft.PowerShell.Management\Microsoft.PowerShell.Management.psd1'')) ; Import-Module -Name ([System.IO.Path]::Combine($PSHOME, ''Modules\Microsoft.PowerShell.Utility\Microsoft.PowerShell.Utility.psd1'')) }')) 2>&1 | ForEach-Object { Write-Verbose $_.Exception.Message -Verbose } ; Import-Module -Name 'C:\azagent\A3\_work\_tasks\IISWebAppManagementOnMachineGroup_1b2aec60-dc49-11e6-9b76-63056e018cac\0.5.15\ps_modules\VstsTaskSdk\VstsTaskSdk.psd1' -ArgumentList @{ NonInteractive = $true } -ErrorAction Stop ; $VerbosePreference = 'SilentlyContinue' ; $DebugPreference = 'SilentlyContinue' ; Invoke-VstsTaskScript -ScriptBlock ([scriptblock]::Create('. ''C:\azagent\A3\_work\_tasks\IISWebAppManagementOnMachineGroup_1b2aec60-dc49-11e6-9b76-63056e018cac\0.5.15\IISWebAppManagementOnMachineGroup.ps1'''))"'.
2021-09-29T15:43:15.1631012Z ##[section]Finishing: Stop IIS
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