we have updated our una site to 10.0.0-RC1 successfully and when trying to update to 10.0.0 version we got error in our database (cron job sends that error):

Query:
SELECT `mime_type` FROM `sys_storage_mime_types` WHERE `ext` = ?

Mysql error:
MySQL server has gone away

Location:
The error was found in getOne function in the file /home/qizjud21adde/public_html/social/inc/classes/BxDolStorageQuery.php at line 49.

collation_connection:
utf8mb4_unicode_ci