Database Host with Port definition like localhost:3306 is incorrect for PDO driver.
PDO expect Port as separated options.
test
set database driver to MySql (PDO)
add Port to your database host, eg localhost:3306 (3306 is default MySql port)
expected
all works fine
actual
you got error Error displaying the error page: Application Instantiation Error: Could not connect to PDO: SQLSTATE[HY000] [2005] Unknown MySQL server host 'localhost:3306' (2)
Just tested successful if we get the CS issue fixed we can move it to RTC. Thanks @Fedik !
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