SELECT command denied to user ''@'localhost' for table 'pma_table_uiprefs'

SELECT `prefs` FROM `phpmyadmin`.`pma_table_uiprefs` WHERE `username` = 'admin_db1' AND `db_name` = 'admin_db1' AND `table_name` = 'testtable'

GRANT SELECT,INSERT,UPDATE,DELETE ON phpmyadmin.* TO 'admin_db1'@'localhost' IDENTIFIED BY 'mypassword';