Error on installation (setup)

After entering DB information (correct ones) I got this:

Fatal error: Uncaught Error: Call to undefined function check_db_utf8_support() in XXX/include/install/resources/utils.php:138 Stack trace: #0 XXX/install/ConfirmConfig.php(50): Installation_Utils::checkDbConnection(XXX, false, 'true', '', '') #1 /XXX/install.php(41): include('/XXX/...') #2 {main} thrown in /XXX/install/resources/utils.php on line 138

Version 19 installed fine on the same server.

Set the var to true (after altering db via SQL) and it works.

which var to change to true ? can you clarify ? and what needs to change in the db.
I fixed that by changing the function to a static function then used self::checkDbConnection function. I think this is a bug.

Same issue here, don't understand what var needs to change.

for the installation to succeed this step, change the line at include/install/resources/utils.php
to
$db_utf8_support = self::check_db_utf8_support($conn);

then change the function to be
static function check_db_utf8_support($conn)

this function check_db_utf8_support should be a static and called with self::