Deprecated: base64_decode(): Passing null to parameter #1 ($string) of type string is deprecated in D:\Server\ProjectJI\Data\DataEncoder.php on line 15

Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in D:\Server\ProjectJI\Authenticate\OAuthRequest.php on line 197

Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') AS isSuccess' at line 1 in D:\Server\ProjectJI\DBUtils\DBConnector.php:127 Stack trace: #0 D:\Server\ProjectJI\DBUtils\DBConnector.php(127): mysqli_query(Object(mysqli), 'SELECT EXISTS (...') #1 D:\Server\ProjectJI\DBUtils\DBConnector.php(118): DBConnector->QuerySQL('SELECT EXISTS (...') #2 D:\Server\ProjectJI\Authenticate\OAuthRequest.php(242): DBConnector->IsExistRow('userAccount', 'WHERE user_acco...') #3 D:\Server\ProjectJI\Authenticate\OAuthRequest.php(204): OAuthRequest->ExistUser(NULL) #4 D:\Server\ProjectJI\UserDB\ChangeUserNickname.php(9): OAuthRequest->ChangeUserNickname(NULL, NULL) #5 {main} thrown in D:\Server\ProjectJI\DBUtils\DBConnector.php on line 127