looker error

I have used https://lookerstudio.google.com , and added click house as data source & connection success, for testing: i run queries and results “OK”, but for complex/sub queries i got error “” at same time same query run successfully in Click House. for click house i configured " <max_memory_usage>10000000000</max_memory_usage>

<max_result_rows>1000000</max_result_rows>
<max_result_bytes>1000000000</max_result_bytes>

<max_execution_time>180</max_execution_time>
<receive_timeout>300</receive_timeout> "