At the time of writing this post the latest pfSense CE version is 2.72 but as you can see in the screenshoot it does not show ( for me it happened on more than 50% of the boxes i manage, 25+, which where upgraded before from 2.6.0 )

So we need to login CLI to start fixing:

• do a config backup just in case
• first option try option 13 in console menu, probably will fail with a message similar to this:
  
  ERROR: It was not possible to determine pfSense-upgrade remote version
  
• back in console menu, select option 8 and enter this commands:
  • pkg-static upgrade (will fail probably withi below error)
    • if you ket an error saying something a kernel mismatch version run command pkg-static upgrade -f and click yes when asked to ignore
  • pkg-static set -v 0 pfSense-rc
  • pkg-static upgrade

The warnings at the end are for future investigations.