What's Oops? "Oops something's gone wrong!"

[merabchik]

Here is my case where is returned something strange response, I can't debug it why or how to track problem?
(Nice solution for fast API mapped with database schema, thanks)
https://127.0.0.1:8000/default/product.json
{
"response": {
"status": 400,
"message": "(0) Oops something's gone wrong!"
}
}

CONFIG:
'default' => true, // Default dataset
'name' => 'database_name',
'username' => 'root', // root is default
'password' => 'pass', // root is default
'server' => 'host', // localhost default
'port' => 3306, // 3306 is default
'ttl' => 1, // Cache time to live. Disable cache (1 second only)
'type' => 'mysql', // mysql is default
'table_docs' => $docs['dataset'],
'table_list' => [], // Tables's whitelist (Allow only the tables in this list, if empty allow all)
'table_blacklist' => [/blacklist users table/
$users_table,
], // Tables's blacklist
'column_list' => [], // Columns's whitelist (Allow only the columns in this list, if empty allow all)
'column_blacklist' => [], // Columns's blacklist