Your latest update to the MiniCopterOptions is causing a conflict with the Vehicles plugin from Codefling (https://codefling.com/plugins/vehicles). WIth that plugin, players can spawn minis with unlimited fuel. With your latest release, the helis fly for a few seconds then crash to the ground. If I switch to the previous version of Minicopter Options, this doesn't happen.
Conflict with vehicles plugin from Codefling.
That will have to be resolved in the other plugin this time. The way the conflict was being avoided before was not a good long term solution because it resulted in incompatibilities with other plugins.
The dev can read the docs of this plugin to see how they can use the hooks. Alternatively, they can enable unlimited fuel the way that the SpawnMini/SpawnHeli does it (highly recommended), which does not alter fuel consumption and therefore avoids this conflict.