Inconsequent description of "cfggameplay.json".
On https://github.com/BohemiaInteractive/DayZ-Central-Economy/blob/master/dayzOffline.chernarusplus/cfggameplay.json all parameters with true/false are defined with 1 or 0.
In https://community.bistudio.com/wiki/DayZ:Gameplay_Settings some bool parameters are defined like (e.g.)
bool ignoreMapOwnership Player can open a map (and just the map) using dedicated input ("M") even without map in player's inventory. [default: false]
Should now be used the 0/1 or true/false ???
On the wiki page it is also described:
The gameplay settings are located in DZ\worlds\chernarusplus\ce\cfggameplay.json, before you can start using it, you need to copy this file to your mission folder.
But there is no "ce" subfolder, it's located directly in the \mpmissions\dayzOffline.chernarusplus folder.