I am having no success with trying to do the update from 2.7.0-RELEASE to 2.7.2. With the GUI under System/ Update/ System Update it says 2.7.0 is up to date.
When I do it through the command line with command option 13 I get :

Enter an option: 13

ERROR: It was not possible to determine pkg remote version
>>> Updating repositories metadata...
Updating pfSense-core repository catalogue...
pkg-static: An error occured while fetching package
pkg-static: An error occured while fetching package
repository pfSense-core has no meta file, using default settings
pkg-static: An error occured while fetching package
pkg-static: An error occured while fetching package
Unable to update repository pfSense-core
Updating pfSense repository catalogue...
pkg-static: An error occured while fetching package
pkg-static: An error occured while fetching package
repository pfSense has no meta file, using default settings
pkg-static: An error occured while fetching package
pkg-static: An error occured while fetching package
Unable to update repository pfSense
Error updating repositories!
ERROR: It was not possible to determine pfSense-upgrade remote version
ERROR: It was not possible to determine pfSense-upgrade remote version
>>> Upgrading pfSense-upgrade... failed.
pfSense - Serial: vm155s003068 - Netgate Device ID: 4d77ff94b8282495da27

If I do option 8 it is the same.

/root: pfSense-upgrade
ERROR: It was not possible to determine pkg remote version
>>> Updating repositories metadata...
Updating pfSense-core repository catalogue...
pkg-static: An error occured while fetching package
pkg-static: An error occured while fetching package
repository pfSense-core has no meta file, using default settings
pkg-static: An error occured while fetching package
pkg-static: An error occured while fetching package
Unable to update repository pfSense-core
Updating pfSense repository catalogue...
pkg-static: An error occured while fetching package
pkg-static: An error occured while fetching package
repository pfSense has no meta file, using default settings
pkg-static: An error occured while fetching package
pkg-static: An error occured while fetching package
Unable to update repository pfSense
Error updating repositories!
ERROR: It was not possible to determine pfSense-upgrade remote version

Solution:
run: Run: certctl rehash and then try again.