Error occurred during script startup, usually a result of inability to connect to the database:

Error triggered: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ISOLATION LEVEL READ COMMITTED, time_zone = '+0:00'' at line 1.

This was probably caused by a software bug. If these occur often try enabling error-logging via config.php, and report errors to the official devs for help.