Timer KillZombieBrowserSessions is failing due to a exception in action "CleanupZombieProcesses"

Anyone with this issue? 

Error:

The path is not of a legal form.
at System.IO.Path.NewNormalizePath(String path, Int32 maxPathLength, Boolean expandShortPaths)
at System.IO.Path.NormalizePath(String path, Boolean fullCheck, Int32 maxPathLength, Boolean expandShortPaths)
at System.IO.Path.GetFullPathInternal(String path)
at System.IO.DirectoryInfo.Init(String path, Boolean checkHost)
at OutSystems.NssUltimatePDF.Browser.Cleanup.CleanupDirectories()
at OutSystems.NssUltimatePDF.CssUltimatePDF.MssCleanupZombieProcesses(String ssTemporaryFolder, DateTime ssThresholdDateTime)
at ssUltimatePDF.RssExtensionUltimatePDF.MssCleanupZombieProcesses(HeContext heContext, String inParamTemporaryFolder, DateTime inParamThresholdDateTime)