Oops error in general settings after update

[Louis Switch My Server]

Hi,

After the upgrade to 8.0.2 I receive these same errors on a few different areas such as General Settings, Automation Settings, Configure Admin etc.

Exception: DateTime::__construct(): Invalid date.timezone value 'n/a', we selected the timezone 'UTC' for now. in /customer/vendor/nesbot/carbon/src/Carbon/Traits/Timestamp.php:30
Stack trace:
#0 /customer/vendor/nesbot/carbon/src/Carbon/Traits/Timestamp.php(30): DateTime->__construct('@1603107349')
#1 /customer/vendor/whmcs/whmcs-foundation/lib/Carbon.php(0): Carbon\Carbon::createFromTimestamp(1603107349, NULL)
#2 /vendor/whmcs/whmcs-foundation/lib/Admin.php(0): WHMCS\Carbon::createFromTimestamp(1603107349)
#3 /vendor/whmcs/whmcs-foundation/lib/Admin.php(0): WHMCS\Admin->hasAuthConfirmation()
#4 /customer/admin/configadmins.php(0): WHMCS\Admin->requireAuthConfirmation()
#5 {main}

PHP 7.2.34 (cli) (built: Oct 18 2020 17:33:16) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies
    with the ionCube PHP Loader + ionCube24 v10.4.4, Copyright (c) 2002-2020, by ionCube Ltd.

Any advise would be very much appreciated.

Thank you.

[souzadavi]

Check your php timezone, whmcs and server time zone. It's look like there isn't time zone defined. They are the same?

[WHMCS John]

Hi @Louis Switch My Server,

It sounds like your PHP error_reporting level might be a little high to be emitting warnings.

Please make sure they are set according to the following guide:https://docs.whmcs.com/Enabling_Error_Reporting#PHP_Warnings_and_Notices

Regarding the warning, make sure a default timezone is specified in your php.ini