Editing metatdata on devnet fails

[drez]

The API call to https://realms-solanad-50cd.devnet.rpcpool.com/
{
"method": "getRecentBlockhash",
"jsonrpc": "2.0",
"params": [
{
"commitment": "confirmed"
}
],
"id": "b9e4d7ca-7932-4d5f-9bba-d0864d27cf58"
}

results on

{
"jsonrpc": "2.0",
"error": {
"code": -32601,
"message": "Method not found"
},
"id": "e43b18d2-b753-47fe-a1e9-e25e427e8866"
}