Error Code: 0x803F8001 while updating apps

I can't update these two apps- Store purchase app, paid wifi and cellular. Other apps seem to work well. Can't figure out what's wrong. Help?

Irene said:

I think you will find the resolution by Ramesh.Kumar in the following thread :
https://answers.microsoft.com/en-us/...d9c1550?page=2

Thank you for your reply but that didn't help.