me arroja error al querer cambiar la portada {    "headers": {        "normalizedNames": [],        "lazyUpdate": null    },    "status": 200,    "statusText": "OK",    "url": "https://genniux.net/api/general/file/upd",    "ok": false,    "name": "HttpErrorResponse",    "message": "Http failure during parsing for https://genniux.net/api/general/file/upd",    "error": {        "error": {},        "text": "\ncan't open file"    }}