The mediatopic.post request returns Service is temporary unavailable?

Question

Classmates

Hello.

First, according to the documentation, I send photos.
There are no problems here.

Next, I'm trying to post to a group.
I send a request using the OdnoklassnikiSDK::makeRequest method from php-sdk.

OdnoklassnikiSDK::makeRequest('mediatopic.post', $data);

where $data
Array
(
[type] => GROUP_THEME
[gid] => group_id
[attachment] => {
"media": [
{
"type": "text",
"text": "Ad text"
},
{
"type ": "photo",
"list": [{ "id ": "yGN4K + DpfBCUiw3f2hZzPRHW5FFGr + XC4SRaMNWLMpRyEhBhB8fo / w26HJBVycU2ANu2fgkCOQdIFPWbZaeFZVpYPWQ / KrAg1knwZh / Zfp + RT9UJy0oPJQc0io5EZSXsG5iIhj07zC85iSudcFQkzg =="}, { "id": " 4 + yHENXwGcoBtpplkF98H71Zymeemz / iD0jb7xoPNfIG9THvT / 8I3WgD55kdY41JW / 21CLQIST ++ ZlO6kqiDosfa9dvB6jPu9Qw6h + gAkOgYLFBcQ5bmrBOqrn2YPCL3hiHXOOSQ7obpMj9rtp6mQg = = "}, {" id ":" + upQMRmQvt1 D1JL9kgla9miZtHgnqBhXc0anlYMOQ9 / fCzTG / L2R7RZQlpWZYmuEQGooPc13cSkFSaEuiP8RJAivhhf / YCTc65TcW 2XlPScLaZ9xEoiNRp6CuLM91v8fgUeXrhtileU8TKnvsq9Vw == + "}]
}
]
}
)

In response to receiving
Array
(
[error_code] => 2
[error_msg] => SERVICE: Service is temporary unavailable.
[error_data] =>
)

Am I doing something wrong or is the service really down?