Timezone ID '' is invalid

After upgrade from 1.5.6.4 to 3.1.0.0.b everything seems to work but attempts to configure the (single) store results in:

Notice: date_default_timezone_set(): Timezone ID '' is invalid in \http\admin\controller\setting\setting.php on line 348
date.timezone was configured. Where else does opencart expect a timezone configuration?

--> a phpinfo() gives as settings:

date/time support enabled
timelib version 2017.06
"Olson" Timezone Database Version 2018.5
Timezone Database internal
Default timezone Europe/Zurich

What is the defined timezone setting in your admin - > systems - > settings - > edit settings page?

straightlight wrote: ↑

Sat Nov 10, 2018 7:39 pm

What is the defined timezone setting in your admin - > systems - > settings - > edit settings page?

Exactly that is the problem. When I click edit I get the error message..

Lösung:
in admin\controller\setting\setting.php#348
-348 date_default_timezone_set($this->config->get('config_timezone'));
+348 date_default_timezone_set("Europe/Zurich");

Danach kann man tatsächlich unter Settings den richtigen Timezone wählen und die Änderungen in setting.php wieder rückgängig machen.