This fixed it on my machine

.github/workflows/main.yml

@@ -50,13 +50,13 @@ jobs:
         echo "Building XML"
         cat Meta.xml
         $xml = New-Object XML
-        $xml.load("Meta.xml")
+        $xml.load($(gi .\Meta.xml).Fullname)
         echo $xml.meta
         $xml.meta.Hash = $(Get-FileHash $Env:GITHUB_WORKSPACE\Release.zip).Hash
         $xml.meta.Version = "${{ steps.base_init.outputs.vers }}"
         $xml.meta.File = "${{ steps.upload_release_asset.outputs.browser_download_url }}"
         echo $xml.meta
-        $xml.save("Meta.xml")
+        $xml.save($(gi .\Meta.xml).Fullname)
         cat Meta.xml
         echo "Removing UTF-8 BOM"
         $FilePath=$(pwd).Path + "\Meta.xml"