Thanks for taking the time to report this bug and trying to make Ubuntu better.
Checking the logs, this is the problem you faced:
mysqld: Error on realpath() on '"/var/lib/mysql-files/";' (Error 2 - No such file or directory)
Could you confirm that the /var/lib/mysql-files does not exist? Did you apply any customization in your environment?
Thanks for taking the time to report this bug and trying to make Ubuntu better.
Checking the logs, this is the problem you faced:
mysqld: Error on realpath() on '"/var/ lib/mysql- files/" ;' (Error 2 - No such file or directory)
Could you confirm that the /var/lib/ mysql-files does not exist? Did you apply any customization in your environment?