Compilation of ppam add-in failed with error message " 'cp' is an undeclared prefix. Line 2, position 2."

[m-kovac]

The compilation of ppam add-in failed with error message 'cp' is an undeclared prefix. Line 2, position 2. with stack trace

at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.LookupNamespace(NodeData node)
at System.Xml.XmlTextReaderImpl.ElementNamespaceLookup()
at System.Xml.XmlTextReaderImpl.ParseAttributes()
at System.Xml.XmlTextReaderImpl.ParseElement()
at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
at System.Xml.XmlReader.MoveToContent()
at System.IO.Packaging.PartBasedPackageProperties.ParseCorePropertyPart(PackagePart part)
at System.IO.Packaging.PartBasedPackageProperties..ctor(Package package)
at System.IO.Packaging.Package.get_PackageProperties()
at vbamc.VbaCompiler.CompilePowerPointMacroFile(Stream outputMacroFileStream, Stream vbaProjectStream, PresentationDocumentType documentType, String customSourcePath)
at AddinService.Wrappers.CompileWrapper.CompileAddin(CompilerInputData data) in /src/src/AddinService/Wrappers/CompileWrapper.cs:line 84
at AddinService.Wrappers.CompileWrapper.CompileAndGetByteArray(CompilerInputData data) in /src/src/AddinService/Wrappers/CompileWrapper.cs:line 22

This happened only once. It appears that this exception was produced when running regular e2e tests.