Try installing from sign.ps1

Author: seanbudd

.github/workflows/testAndPublish.yml

@@ -199,9 +199,9 @@ jobs:
       run: ci/scripts/setSconsArgs.ps1
       env:
         apiSigningToken: ${{ (github.event_name == 'push' && env.feature_signing) && secrets.API_SIGNING_TOKEN || '' }}
-    - name: Install SignPath
-      if: ${{ github.event_name == 'push' && env.feature_signing }}
-      run: Install-Module -Name SignPath -Force
+    # - name: Install SignPath
+    #   if: ${{ github.event_name == 'push' && env.feature_signing }}
+    #   run: Install-Module -Name SignPath -Force
     - name: Create launcher
       shell: cmd
       run: scons %sconsOutTargets% %sconsArgs% ${{ !runner.debug && '--all-cores' || '-j1'}}

appveyor/scripts/sign.ps1

@@ -8,5 +8,5 @@ param(
     [string]$FileToSign
 )
 
-Import-Module -Name SignPath
+Install-PSResource -Name SignPath -TrustRepository
 Submit-SigningRequest -ApiToken $ApiToken -InputArtifactPath $FileToSign -OutputArtifactPath $FileToSign -OrganizationId "12147e94-bba9-4fef-b29b-300398e90c5a" -ProjectSlug "NVDA" -SigningPolicySlug "release_signing_policy" -WaitForCompletion -Force