разобрался)) проблема заключалась в "Setting for backpack as item. ( Write null to disable )": null, прописал так везде, только тогда все заработало)
{
"How many backpacks can player take in his inventory at same time.": 0,
"If u have another plugin that controls custom items stacks, enable this.": true,
"If player has this perm he won't lose backpack on death.": "ubackpack.ignore",
"If player has this perm his backpack won't drop, but will be erased.": "ubackpack.erase",
"List of custom backpacks.": [
{
"Capacity of backpack. (Max 42)": 6,
"Black list of items that cannot be placed in backpack.": [
"rifle.lr300"
],
"Advanced black list of items that cannot be placed in backpack.": [
{
"MaxValue": 10,
"ItemInfo": "explosive.timed"
}
],
"Permision that player need to open backpack, not working with item backpacks.": "ubackpack.6",
"Working with backpack ignore permission?": true,
"Erase backpack on death?": false,
"Setting for backpack as item. ( Write null to disable )": null
},
{
"Capacity of backpack. (Max 42)": 12,
"Black list of items that cannot be placed in backpack.": [
"rifle.lr300"
],
"Advanced black list of items that cannot be placed in backpack.": [
{
"MaxValue": 10,
"ItemInfo": "explosive.timed"
}
],
"Permision that player need to open backpack, not working with item backpacks.": "ubackpack.12",
"Working with backpack ignore permission?": true,
"Erase backpack on death?": false,
"Setting for backpack as item. ( Write null to disable )": null
},
{
"Capacity of backpack. (Max 42)": 24,
"Black list of items that cannot be placed in backpack.": [
"rifle.lr300"
],
"Advanced black list of items that cannot be placed in backpack.": [
{
"MaxValue": 10,
"ItemInfo": "explosive.timed"
}
],
"Permision that player need to open backpack, not working with item backpacks.": "ubackpack.24",
"Working with backpack ignore permission?": true,
"Erase backpack on death?": false,
"Setting for backpack as item. ( Write null to disable )": null
},
{
"Capacity of backpack. (Max 42)": 42,
"Black list of items that cannot be placed in backpack.": [
"rifle.lr300"
],
"Advanced black list of items that cannot be placed in backpack.": [
{
"MaxValue": 10,
"ItemInfo": "explosive.timed"
}
],
"Permision that player need to open backpack, not working with item backpacks.": "ubackpack.42",
"Working with backpack ignore permission?": true,
"Erase backpack on death?": false,
"Setting for backpack as item. ( Write null to disable )": null
}
],
"Virtual backpack image, must be white for correct work of gradient.": "
",
"Backpack gradient. The more values you add, the smoother the color will change depending on the backpack filling.": [
"#FFFFFF",
"#C8FE2E",
"#FACC2E",
"#FE9A2E",
"#FE642E",
"#FE2E2E"
],
"Backpack open chat commands.": [
"bp",
"backpack"
],
"Backpack open console commands.": [
"open.backpack",
"backpack.open",
"open.bp"
]
}