1021: Disk full (/tmp/#sql_549_2.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")

Warning: file_put_contents(): Only 0 of 1800 bytes written, possibly out of free disk space in /var/www/vhosts/sportschools.ru/httpdocs/includes/config.inc.php on line 207 Error occured. Please see the logs or report an error to the administrator Warning: Unknown: write failed: No space left on device (28) in Unknown on line 0 Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/lib/php/session) in Unknown on line 0