Update from 3.12.10 -> 3.13.0 Error

siambit

Network license
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Joined
Jun 15, 2014
Messages
27
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Update from 3.12.10 -> 3.13.0


📃Error log message


Error
Fatal error [400]: SQLSTATE[42000] [1115] Unknown character set: 'utf8mb4'
Triggered in /lib/G/classes/class.db.php at line 99

Stack trace:
#0 /lib/G/classes/class.db.php(110): G\DB->__construct()
#1 /app/loader.php(65): G\DB::getInstance()
#2 /index.php(20): include_once('/app/loader.php')


How should I fix it?