Problem with RatOS config

hello i have a old V-Core3 maschine with SKR 3 H723and Toolboard BIGTREETECH EBB36 v1.2 both USB. I can fash both board but on the point confirm your setup i see Toolboard is conected but the SKR3, see screenshot...

The online help says use othe USB Cabel but this helps not!

I can not save the configuration, because i got errors from Klipper, see here



Error
[
{
"code": "invalid_type",
"expected": "string",
"received": "undefined",
"path": [
"z1_step_pin"
],
"message": "Required"
},
{
"code": "invalid_type",
"expected": "string",
"received": "undefined",
"path": [
"z1_dir_pin"
],
"message": "Required"
},
{
"code": "invalid_type",
"expected": "string",
"received": "undefined",
"path": [
"z1_enable_pin"
],
"message": "Required"
},
{
"code": "invalid_type",
"expected": "string",
"received": "undefined",
"path": [
"z1_uart_pin"
],
"message": "Required"
},
{
"code": "invalid_type",
"expected": "string",
"received": "undefined",
"path": [
"z2_step_pin"
],
"message": "Required"
},
{
"code": "invalid_type",
"expected": "string",
"received": "undefined",
"path": [
"z2_dir_pin"
],
"message": "Required"
},
{
"code": "invalid_type",
"expected": "string",
"received": "undefined",
"path": [
"z2_enable_pin"
],
"message": "Required"
},
{
"code": "invalid_type",
"expected": "string",
"received": "undefined",
"path": [
"z2_uart_pin"
],
"message": "Required"
}


can you help here, i don´t have a idea. Thanks
grafik.png
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