issue with take dmg

[jopistok]

[03:22:10] [Server thread/ERROR]: [puffish_skills] Configuration could not be loaded:
Could not read file experience.json.

experience.json

{
"enabled": true,
"experience_per_level": {
"type": "values",
"data": {
"values": [
100,
125,
150,
175,
200,
225,
250,
275,
300,
325,
350,
375,
400,
425,
450,
475,
500,
525,
550,
575,
600,
625,
650,
675,
700,
725
]
}
},
"sources": [
{
"type": "puffish_skills:take_damage",
"data": {
"parameters": {
"damage": {
"type": "minecraft:damage",
}
},
"experience": [
{
"expression": "damage * 0.25"
}
]
}
}
]
}

I just copied code from page about take_damage, and it doesn't work. I can't figure out, where is mistake.

[jopistok]

vesion mc: 1.18.2 fabric

[pufmat]

Are you sure you copied it correctly? Instead of "type": "minecraft:damage" it should be "type": "damage", also make sure to remove trailing comma on this line.