Error 0x800b0101 when adding Account to Windows 8 RT

Found my old Dell tablet with Windows RT. Didn’t use it for more than a year.

• Wanted to add a new account. Error.
• Wanted to search for updates. Error.

Error: 0x800b0101

Quick fix. Set correct time and date. Mine was October 2015 (now is April 2016). Horray! Everything works again.