4100 remote backup error positive integer

when i select the second browse to my source to be backed up onto I get an error positive integer, passwords good ssh good, source on my 4100 of the shares shows all the folders, never happened before?

Hi @Donaldperrin,

Have you opened a Support Case? If not opened, for more information, please contact the WD Technical Support team for the best assistance and troubleshooting:
https://support-en.wd.com/app/ask