The plugin does not work at all, nothing spawns from the barrels. I tried settings from standard to different, everything is useless, nothing spawns from barrels even at 100%

did you set permisions ?
barrelless.globaltrigger is needed to use the permission system for the player/group
then you can add the permissions to the player/group yopu want them to have

Thanks for your help and quick response.

Merged post

Another question, is this permission set for the admin or for all players?

to whoever you set it to with barrelless.globaltrigger as base perm group/player