Signing fails (HSM) with [error]The term 'sign.exe' is not recognized

[PstXp]

Describe the bug
singing fails with the following error,
##[error]The term 'sign.exe' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.

the used yaml
please provide the yaml that you used. It helps you put the yaml like this:

stages:
  - stage: Stage1
    displayName: Build
    jobs: 
    - job: Job1
      displayName: Build
      steps:
      - checkout: self
        clean: true


      #Compile and Publish app
      # Compile app
    # Compile app for the Current Version
      - task: ALOpsAppCompiler@2
        condition: and(eq(variables['artifactVersion'], ''), eq(variables['pipelineTarget'], 'current'))
        displayName: 'ALOPS - Compile App'
        inputs:
          artifacttype: $(artifactType)
          artifactcountry: $(artifactCountry)
          versionselect: 'Latest'
          appversiontemplate: $(appVersion)
          appFilenametemplate: '%APP_PUBLISHER%_%APP_NAME%_%APP_VERSION%.app'
          failed_on_warnings: false
          alSourcePath: $(Build.Repository.Name)/App/app.json
          preprocessorsymbols: $(Preprocessorsymbols)
          printappmanifest: true
          pwsh : $(PS7)


      - task: ALOpsAppSign@1
        inputs:
          signmethod: 'HSM'
          usedocker: false
          artifact_path: '$(Build.ArtifactStagingDirectory)'
          timestamp_uri: 'http://timestamp.acs.microsoft.com'
          hsmmethod: 'TRUSTED'
          hsm_description: '<companyname>'
          hsm_description_url: '<companyurl>'
          hsm_signing_endpoint: 'https://weu.codesigning.azure.net/'
          hsm_signing_account: '<singingaccount>'
          hsm_trusted_certificateprofile: '<certprofile>'

the output
Also the complete output is necessary for us to see what is going on. Also use backtics:

publish_artifact               True                              
timestamp_uri                  http://timestamp.acs.microsoft.com/
pfx_path                       C:\a\2\s                          
pfx_password                                                     
hsmmethod                      TRUSTED                           
hsm_description                <companyname>                          
hsm_description_url            <companydescription>                         
hsm_digestalgorithm            sha256                            
hsm_signing_endpoint           https://weu.codesigning.azure.net/
hsm_signing_account           <singingaccount>   
hsm_trusted_certificateprofile <certprofile>                       
hsm_keyvault_name                                                
hsm_keyvault_certificate_name                                    
hsm_tenantid                                                     
hsm_clientid                                                     
hsm_client_secret                              

                
True
*** For documentation, please visit   : https://www.alops.be/documentation

*** ALOps License:
  * Licensed To: Mprise BV (Project License)

*** Importing required PS-Functions
*** Resolve App file in [C:\a\2\a]
*** Multiple App files found with filter [*.app].
  * C:\a\2\a\<appname>26.26.202608.27577.app
*** Resolved App File: [C:\a\2\a\<appname>_26.26.202608.27577.app].
*** Starting App Sign for: 
  * C:\a\2\a\<appname>_26.26.202608.27577.app
*** App Sign: C:\a\2\a\<appname>_26.26.202608.27577.app
*** NavSip registration OK
*** App File: C:\a\2\a\<appname>_26.26.202608.27577.app
*** Timestamp Service: http://timestamp.acs.microsoft.com/
*** Setup Pfx File
*** PFX File: C:\a\2\s
*** Sign Method: HSM
*** Setup Sign Tool
Package Id      Version                 Commands ------------------------------------------------ sign            0.9.1-beta.25379.1      sign    
*** Sign Tool installed versions:
  * 0.9.1-beta.25379.1 => 0.9.1
##[error]The term 'sign.exe' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
Finishing: ALOpsAppSign  

Expected behavior
The app to be signed with the provided azure artifact signing details

Screenshots
If applicable, add screenshots to help explain your problem. You can easily paste them in here.

Additional context
Although hard to determine if it has any influence, the hsm_description and hsm_url were mandatory, but not documented

first run (with signtool not installed, .NET 8 not installed, it gave a warning to reopen the prompt before it could be used, and failed earlier, but that is something we will file under a different bug. but this issue is more pressing.
The docker option searched for a specific docker tag, but failed to attach.