$response = $vk->groups()->getById($access_token, array(
'group_ids' => array($_POST['group'])
));
try{
echo "<pre>";
print_r($response);
echo "</pre>";
} catch (Exception $e) {
echo 'Ошибка';
}
[Fri Nov 23 10:25:14.340117 2018] [cgi:error] [pid 25999] [client 87.245.144.104:42552] AH01215: PHP Notice: Undefined index: submit in адрес сайта/gr.php on line 8
[Fri Nov 23 10:25:19.236421 2018] [cgi:error] [pid 26002] [client 87.245.144.104:42554] AH01215: PHP Fatal error: Uncaught VK\\Exceptions\\Api\\VKApiParamException: One of the parameters specified was missing or invalid: group_ids is undefined in адрес сайта/vendor/vkcom/vk-php-sdk/src/VK/Exceptions/Api/ExceptionMapper.php:58, referer: адрес сайта/gr.php
[Fri Nov 23 10:25:19.236529 2018] [cgi:error] [pid 26002] [client 87.245.144.104:42554] AH01215: Stack trace:, referer: адрес сайта/gr.php
[Fri Nov 23 10:25:19.236904 2018] [cgi:error] [pid 26002] [client 87.245.144.104:42554] AH01215: #0 адрес сайта/vendor/vkcom/vk-php-sdk/src/VK/Client/VKApiRequest.php(132): VK\\Exceptions\\Api\\ExceptionMapper::parse(Object(VK\\Client\\VKApiError)), referer: адрес сайта/gr.php
[Fri Nov 23 10:25:19.237252 2018] [cgi:error] [pid 26002] [client 87.245.144.104:42554] AH01215: #1 адрес сайта/vendor/vkcom/vk-php-sdk/src/VK/Client/VKApiRequest.php(88): VK\\Client\\VKApiRequest->parseResponse(Object(VK\\TransportClient\\TransportClientResponse)), referer: адрес сайта/gr.php
[Fri Nov 23 10:25:19.237537 2018] [cgi:error] [pid 26002] [client 87.245.144.104:42554] AH01215: #2 адрес сайта/vendor/vkcom/vk-php-sdk/src/VK/Actions/Groups.php(88): VK\\Client\\VKApiRequest->post('groups.getById', '44b62201579e8b2...', Array), referer: адрес сайта/gr.php
[Fri Nov 23 10:25:19.237736 2018] [cgi:error] [pid 26002] [client 87.245.144.104:42554] AH01215: #3 адрес сайта/gr.php(11): VK\\Actions\\Groups->getById('44b62201579e8b2...', Array), referer: адрес сайта/gr.php
[Fri Nov 23 10:25:19.237757 2018] [cgi:error] [pid 26002] [client 87.245.144.104:42554] AH01215: #4 {main}, referer: адрес сайта/gr.php
[Fri Nov 23 10:25:19.237976 2018] [cgi:error] [pid 26002] [client 87.245.144.104:42554] AH01215: thrown in адрес сайта/vendor/vkcom/vk-php-sdk/src/VK/Exceptions/Api/ExceptionMapper.php on line 58, referer: адрес сайта/gr.php
Вот именно тот момент что прописывать нужные таксономии