VK.com stopped working, re-authorization doesn’t help anymore

Autoposting to VK.com has stopped working today. Re-authorization doesn’t help anymore. I have even tried to remove the account from SNAP and re-created a new one. No luck. Since now all attempts to post to VK.com end up with this error:

Array ( [pgID] => [isPosted] => 0 [pDate] => 2018-03-01 18:10:35 [Error] => -=IMG ERROR=- Error: Array ( [headers] => Array ( [server] => Apache [date] => Thu, 01 Mar 2018 18:10:36 GMT [content-type] => application/json; charset=utf-8 [content-length] => 476 [connection] => keep-alive [x-powered-by] => PHP/3.14758 [set-cookie] => remixlang=3; expires=Thu, 28 Feb 2019 05:52:44 GMT; path=/; domain=.vk.com [pragma] => no-cache [cache-control] => no-store [content-encoding] => gzip ) [body] => {“error”:{“error_code”:8,”error_msg”:”Invalid request: v (version) is required”,”request_params”:[{“key”:”oauth”,”value”:”1″},{“key”:”method”,”value”:”wall.post”},{“key”:”from_group”,”value”:”1″},{“key”:”message”,”value”:”Test post”},{“key”:”attachment”,”value”:””}]}} [response] => Array ( [code] => 200 [message] => OK ) [cookies] => Array ( [0] => nxs_Http_Cookie Object ( [name] => remixlang [value] => 3 [expires] => 1551333164 [path] => / [domain] => .vk.com ) ) ) )