Problem:
We get the error below when adding new posts:
Uncaught Error: Call to a member function get_value_filtered() on null in .../types/application/models/field/type/checkbox/view/frontend.php:33
Solution:
Head to Toolset > Custom Fields > and open all groups where you have saved a Field of Checkbox type.
Ensure, that none of these fields stores a 0 (numerical zero) as value.
If it does, replace with something allowed (0 is not allowed, as the GUI will tell you)
This should resolve that exceptional error.
If not, please report it to us.
