Thanks for reply. I switched to developer's mode. That's is what I got:
2 exception(s):
Exception #0 (Zend_Db_Statement_Exception): SQLSTATE[42S02]: Base table or view not found: 1146 Table 'magento2.catalogsearch_fulltext_scope1' doesn't exist, query was: INSERT INTO `search_tmp_5eb592164ff260_69624311` SELECT `main_select`.`entity_id`, SUM(score) AS `relevance` FROM (SELECT DISTINCT `eav_index`.`entity_id`, (((0)) * 1 + LEAST((MATCH (data_index) AGAINST ('test*' IN BOOLEAN MODE)), 1000000) * POW(2, search_weight)) AS `score` FROM `catalog_product_index_eav` AS `eav_index`
INNER JOIN `catalogsearch_fulltext_scope1` AS `search_index` ON eav_index.entity_id = search_index.entity_id
INNER JOIN `catalog_eav_attribute` AS `cea` ON search_index.attribute_id = cea.attribute_id
INNER JOIN `cataloginventory_stock_status` AS `stock_index` ON stock_index.product_id = eav_index.entity_id AND `stock_index`.`website_id` = 0 AND `stock_index`.`stock_status` = 1 AND `stock_index`.`stock_id` = 1 WHERE (eav_index.store_id = '1') AND (`eav_index`.`attribute_id` = 99 AND `eav_index`.`value` in ('3', '4') AND `eav_index`.`store_id` = '1') AND (MATCH (data_index) AGAINST ('test*' IN BOOLEAN MODE))) AS `main_select` GROUP BY `entity_id` ORDER BY `relevance` DESC, `entity_id` DESC
LIMIT 10000
