Spark 2.8.3 filetransfer issue

Hello,

Some user able to share file but some user not able to share file.

OS : Windows 8.1, OS X El Capitan 10.11.6

Error : http://prnt.sc/e3z2h3 

There is some issue in spark latest version, facing file transfer issue often in both OS.

Please help me to resolve the issue.

Thanks.